In PrivateDnsConfig class, `useTls` is replaced with `mode`.
This CL a corresponding change.

Bug: 240259333
Test: atest ConnectivityCoverageTests
Change-Id: I60c53e52f287fc7fa05543603a62632d934bb2e6

Debugging the SIGABRT of this function is annoying because the module
can be built from source or pre-built. It requires finding the correct
version of the symbol to get the correct line number. In addition, there
are 7 consecutive aborts in source code, it is hard to tell whether the
symbolized call stack shows the right line number or not. Adds error
trace before abort so we can identify the root cause without even
symbolizing the call stack of SIGABRT.

Bug: 312094533
Test: make; flash; adb logcat
Change-Id: I74713029d059e10bf5d34694cdb96712bc806696

Bug: 308011229
Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink
      (new tests added)
Change-Id: I42e423c09ffb733a809636360468c963c7864872

A screenshot of the demo app:
![](https://screenshot.googleplex.com/AsiYKPzG4nJpr6x.png)

Bug: 273227725
Change-Id: I8d9bcf00bb54d3f152c436b56df919d967c5b71b

The code currently calls RandomInt twice to generate an address.
For example, if you want to generate the address 192.168.A.B,
RandomInt will be called twice to generate the values for A and B.
To save resources, we can avoid calling RandomInt twice by reusing
the same random value with different masks for A and B.
Before:
  -  RandomInt() & 0xff00 -> A
  -  RandomInt() & 0x00ff -> B
After:
  -  RandomInt() & 0xffff -> A.B

Bug: 312647670
Test: atest TetheringTests
Change-Id: Iee49af3d82781309f78fe66ab07937b8137fa259

On mobile networks it is more likely that the user needs to top up or
get a mobile data subscription, rather than "sign in" as the previous
messaging was suggesting.
Following feedback from interaction designers / UX writers, change the
strings to be more appropriate for the most common use-case.

Bug: 153673376
Test: atest FrameworksNetTests
      manual test on mobile network force-detecting a portal.
Change-Id: I5b4d4a17fd507d8cf3c9863cf23b5fedb258852e

The issue arises when the network becomes validated based on the
isCaptivePortal success with HTTPS, even though the HTTP probe
hasn't been executed yet. Given that there is no way to ensure
HTTP probe was sent in this case, the pass condition should be
relaxed, allowing a single https query instead of expecting both.

Test: atest FrameworksNetIntegrationTests:ConnectivityServiceIntegrationTest#testValidation \
      --rerun-until-failure 100
      (With hardcoded sleep when starting HTTP probe)
Fix: 303351630
Change-Id: I580e9a3a868cd0b3395a20ace27b006529475312

Remove nsd_expired_services_removal aconfig, since it is no
longer used.

Bug: 312669635
Test: m
Change-Id: I9b21b6102ed9a8160be3d853d44d9b051997d09e

framework-connectivity-flagged-apis-droidstubs is used by
jarjar-rules-generator to avoid jarjaring flagged apis.
But, this usage of --show-annotation FlaggedApi in the flag is not
supported.
So this CL removes --show-annotation FlaggedApi.
As far as framework-connectivity-flagged-apis-droidstubs contains
flagged APIs, it's fine that this droidstubs also contains non-flagged
APIs.

Test: TH
Bug: 312408311
Change-Id: I2f1f5624d98873420c0c36ac6e31386102211045

Test: TH
Change-Id: I260665a0afa056e32021c5255a17ea0af59b6575

HandlerThread was introduced in aosp/2493357. This patch moves the
code originally located in buildNewRa() into the HandlerThread.

Bug: 246928127
Test: atest TetheringPrivilegedTests TetheringIntegrationTests \
      TetheringTests
Change-Id: I5f6df0a3a79d7f4a865cfec7f88bc28816b1db95

This patch changes the implementation of UnicastResponder in the
RouterAdvertisementDaemon with FdEventsReader. The change includes
replacing Thread with HandlerThread, create socket in non-blocking
mode (required by FdEventsReader) and use FdEventsReader to listen
to the solicited RS packets. Two commands (CMD_START & CMD_STOP)
were added to control the lifecycle of the FdEventsReader.

Bug: 246928127
Test: atest TetheringPrivilegedTests TetheringIntegrationTests \
      TetheringTests
Test: Enable WiFi hotspot and connected with another Pixel client:
      1. Tcpdump on the Pixel client, checking the RA packets
      2. Verify IPv6 addresses were configured
      3. ping6 2001:4860:4860::64
Change-Id: I6e89903df90864e3bb34d498e353d6f87193e9d6

Per API council feedback and API guideline at
go/android-api-guidelines#provide-executor, it should call
Binder.clearCallingIdentity() before invoking the app-supplied callbacks
so that the app doesn't use the system-server's identity for permission
check in the callback.

Bug: 309952666
Test: atest ThreadNetworkUnitTests
Change-Id: I3cfbce29c0a516506bb76a44b151a583c8477806

This is a clean up commit to address TODO for resetting the
LISTEN_ACTIVITY_TIMEOUT_MS timer as aosp/2188755 was shipped.

Fix: 252972908
Test: atest CtsNetTestCases
Change-Id: Ibc1a1c68883a3772729f24b01f9dc8d3cc37c1eb

- Change class names to start with Xfrm or StructXfrm for consistency
  with other messages and structs
- Create xfrm sub-folder for xfrm messages
- Add "finals" to input parameters

Bug: 308011229
Test: atest NetworkStaticLibTests:com.android.net.moduletests.util.netlink
      (new tests added)
Change-Id: Id6d34b4549bbc1890b3f4dd9f1638977f66e3236

This reverts commit 14499f01.

Reason for revert: b/312408745

Change-Id: I8b03799fe6e0e256263240909ee7446c178bf508

It's no longer needed because the only useful version is v1 and all
functions are deprecated in v2.

Bug: 298594687
Test: m
Change-Id: I0226b7f3d3cda6fb897e02a035e84943913a944e