This reverts commit 13341031.

Reason for revert: The issue causing the build breakage has been fixed

Change-Id: I03fa406551b51aaa4d4d9255cf1a53f9b4bcc1bd
Merged-In: Ib9949b8619c6b148f73630b314c4113d76c31ec1

This reverts commit 394269d8.

Reason for revert: Breaking build - b/183106805
Bug: 183106805
Merged-In: Ib9949b8619c6b148f73630b314c4113d76c31ec1
Change-Id: I9789ed81e630f49c71034b6917188983bd11d774

Given that ConnectivityService is moving to a mainline module, we need
a @SystemApi for it to listen for changes in blocked status of an uid.
So, we decided to create a new API for this which can provide
ConnectivityService with more info about why an uid is blocked (which
will be useful for adding a new similar onBlockedStatusChanged callback
in CM.NetworkCallback) and also captures data saver restriction without
having out to track it separately.

Currently, NPMS does some redundant computations because we are
calculating both uid rules and blocked reasons separately. In a
follow-up change, we will compute uid rules using blocked reasons
and later possibly remove that onUidRulesChanged callback.

Bug: 176289731
Test: atest ./tests/cts/hostside/src/com/android/cts/net/HostsideRestrictBackgroundNetworkTests.java
Test: atest ./tests/net/java/com/android/server/ConnectivityServiceTest.java
Test: atest ./services/tests/servicestests/src/com/android/server/net/NetworkPolicyManagerServiceTest.java
Change-Id: Ib9949b8619c6b148f73630b314c4113d76c31ec1
Merged-In: Ib9949b8619c6b148f73630b314c4113d76c31ec1

* changes:
  Remove per-user preference when the user is removed
  Expose the enterprise per-profile networking API.
  Implement setNetworkPreferenceForUser.
  Public API for per-profile network preference.
  Add tests for setNetworkPreferenceForUser

Test: m -j doc-comment-check-docs
Bug: 175662146
Change-Id: Ie67dd2f4f8d973de37bc64a03908d7cbb7c2b7ad

This is done by:
  1. In requestNetwork, provide a basic permission check.
  2. rematchNetworksAndRequests: no change, since non listen
     requests will be automatically processed to track
     best satisfying network.
  3. applyNetworkReassignment: no change, since non-request
     will not be sent to factories.

Test: atest ConnectivityServiceTest#testRegisterBestMatchingNetworkCallback_noIssueToFactory
Test: atest ConnectivityServiceTest#testRegisterBestMatchingNetworkCallback_trackBestNetwork
Bug: 175662146
Change-Id: I8cf4ab334df6812d84cdda160e9b72b6f54062af

Test: new test for this
Change-Id: I335e82e29ec8f4c8da9def8b40153858cfd5bacb

Also unify the listener for Oem settings, which have
never been released as public API (it is slated to be
released in S).

Test: FrameworksNetTests
Change-Id: I84ba363dd0ec03871c37b1c3a31e5557d9aa12e7

Test: FrameworksNetTests
Change-Id: I8f18083b5857289892fe8adea5f5ea3f5dbe0809

This patch defines the API, but does not make it public
yet as there is no implementation yet.

Test: none so far
Change-Id: I854a952dfe35cc80847eb62f522b1667b8e9b8a0

Test: this
Change-Id: I00e2344118408da307439a0a993eb67cb17bf777

Context is more useful than ContentResolver, it can provide more
information if we want to change the behavior in the future.

Bug: 172183305
Test: atest FrameworksNetTests
Change-Id: I5702c7d74b862a76558b94f1abe2c6df9eb7f097
Merged-In: I5702c7d74b862a76558b94f1abe2c6df9eb7f097

NETWORK_STACK_UID check was introduced by aosp/1134635, and it
assumed that wifi factories/agents will be running on the network
stack process, but it didn't eventually. It runs in the system
server instead. So remove this check.

Bug: 170598012
Test: atest FrameworksNetTests
Change-Id: Ie11268738e364e252f18876f7a4a0dc064ca8b9c

Connectivity is becoming a mainline module in S but mainline
modules are not allowed to use non-formal APIs. Thus, replace
internal okhttp APIs to stable libcore APIs which are created for
using HttpURLConnectionFactory.

Bug: 182238821
Test: atest FrameworksNetTests
Change-Id: I56ba1b9e6e94f9c6519c3f1c8f0c5993fccbe185

* changes:
  Make PacProxyService be a system service
  Revert^2 "Refactor setCurrentProxyScriptUrl to a void method"

* changes:
  Using jniThrowErrnoException in android_util_Process
  Using jniThrowErrnoException in android_os_SharedMemory
  Using jniThrowErrnoException in android_net_NetworkUtils

Bug: 172183305
Test: N/A
Change-Id: Id274295d6c8c97d3014214f875168ff968f79bb6

As attested by numerous TODOs in the code, a new way of
representing network quality and policy is needed instead
of an int.

An int representing the quality of the network requires
all parties using it to know how all other parties are
using it, and implementation details about the decision
algorithm. For all intents and purposes, the selection
is left to individual network factories who try to
achieve a desired result while piecing together all
possible states of the system.

As the number of such cases and desires increases, this
becomes both intractable and unmaintainable. Indeed, at
this time in the codebase nobody can really predict exactly
how a given change in score will affect selection across
the board, and it is essentially impossible to figure out
the behavior of network selection by inspecting the code
because the moving parts are scattered throughout the
entire codebase.

Having an object encapsulating policy and quality values
will let us centralize the selection and make it again
possible to maintain without knowledge of all behaviors
of all network factories. It will also provide better
guarantees of respecting policy, and allow bugfixes that
were not possible before because they'd touch too many
parts of the code.

Test: FrameworksNetTests FrameworksWifiTests NetworkStackTests
Change-Id: I3185a6412b9b659798faf0c6882699e9c63cc115

This reverts commit 62b1df44.

Reason for revert: Build broken: b/182721112

Change-Id: Ibc84ec6d7900fdcf0bc14cd7036f9c08287711db

PacProxyInstaller class is running a thread all the time and is
listening to intent ACTION_PAC_REFRESH so it would be better to
make it be a system service with a manager class PacProxyManager
which is obtained with getSystemService(PacProxyManager.class).
Besides, rename PacProxyInstaller to PacProxyService will
be easier to know it's the service for PacProxyManager.

ConnectivityService is going to be a mainline module and it
needs constructor of PacProxyService to be SystemApi.
However, in current design, it needs to pass a handler and
an int arguments to the constructor which would be difficult
to maintain if just expose the constructor directly.

So, define a listener for the event that the current PAC
proxy has been installed so that the handler and the int
arguments can be removed from the constructor.

Bug: 177035719
Test: FrameworksNetTests
Change-Id: I2abff75ec59a17628ef006aad348c53fadbed076

ConnectivityService is going to become a mainline module, and
it will not able to use hidden method anymore. Using PlatformProperties
as a static library instead of hidden API.

Bug: 170917042
Test: atest FrameworksNetTests
Merged-In: I3a3deca5d2e0f690db8c0061de2db2217376d268
Change-Id: I3a3deca5d2e0f690db8c0061de2db2217376d268

The caller to create a TestNetworkService via
ConnectivityManager#startOrGetTestNetworkManager should have
passed the MANAGE_TEST_NETWORKS permission check and the caller
doesn't need to declare the permission to pass the permission
check of registerNetworkProvider. So call clearCallingIdentity
when calling registerNetworkProvider in TestNetworkService.

Bug: 181573283
Test: atest CtsNetTestCases:ConnectivityManagerTest#testRequestBackgroundNetwork
Change-Id: Ia28627dacf933d1937978ed9709b975c9a4660ce

ParseException constructors are used by both platform and mainline
module code, so they can't be package-private.
Removing dependencies on either side is not possible as the class
itself is part of the public API, and supports APIs on both sides.

Having the constructors part of the API makes the class usable by both
sides.

Fixes: 182705505
Test: CtsNetTestCases for APIs using the exception
Change-Id: Ia396ab2fa3afaed3cf474c8e60f72fc7f3f4fded