After this change, all synchronous state machine functions are
implemented.
There are some intentional limiations:
1. Allow setup states before machine thread started or inside machine
   thread but states can only be setup once before calling #start.
2. The behavior of transitionTo is defined so that the destination
   state can never change during state transitions. Once a destination
   has been specified, it cannot be changed until the previous state
   transition is complete. In other words, SyncStateMachine does not
   support calling transitionTo in State enter or exit.
3. Support sendSelfMessage in State#processMessage(), #enter() and
   #exit(). This allow automaton to decide the follow up action by
   itself. For example: if something wrong happens during state
   transition, the implementation can enqueue an error message then
   process the error message after finishing the current state
   transition.

Test: atest SynStateMachineTest
Change-Id: I0790df4eeab2dccdb9f407d9131a62c3c12d123b

Implement performTransitions which does state transitions.
1. Determine the common ancestor state of current/destination states
2. Invoke state exit list from current state to common ancestor state.
3. Invoke state enter list from common ancestor state to destState by
going through mEnterStateStack.

The state transition is always defined so that the target can never be
changed mid-way of a state transition. In other words, calling
transitionTo in State enter and exit is not allowed.

Test: atest SyncStateMachineTest
Change-Id: I51e8c5440a8b9ac25715c3d030717421f68c15b3

Duplicated state is not allowed.

Test: atest SynStateMachineTest
Change-Id: I0d5c73f666f90aebcfbf535cf0f824c5050941a2

This change adds SyncStateMachine class and provides the user
interface but doesn't have the details implementation.

Test: m
Change-Id: Ic2fa69b9e6424601fc2df2d07a052f48a6a46370

Due to try_make_writable's implementation:

  // try to make the 1st 'len' header bytes r/w via DPA
  void try_make_writable(struct __sk_buff* skb, int len) {
    if (len > skb->len) len = skb->len;
    if (skb->data_end - skb->data < len) bpf_skb_pull_data(skb, len);
  }

This *should* normally result in nothing actually being done.

This is because the 'len' we request should trivially be <= skb->len
(by virtue of how we construct the packet / get here),
and because skb->data_end - skb->data < len was previously
(to this patch) already checked below in line 251
(and thus the packet would have been dropped if it was false).

However, there's a tentative theory that we could somehow end up
with the entire payload in the non-linear portion of the packet,
and thus need to move it into the linear header portion where
we actually have direct packet access to it.

Note also that we already called this in line 71, so it should
be safe to add another call without causing bpf verifier unhappiness...

Test: TreeHugger
Bug: 298879031
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: If3531c3cf6932ac3f1d384a43d28326d17544aa3

Test: none
Change-Id: I0506ec660fd88e39079b2f36aed1516e27cdc0a6

* changes:
  Add third_party/google_benchmark to cronet's copybara
  Move buildtools/third_party/libc++[abi] to third_party in Cronet's copybara
  Cronet Import: Add jni_zero to the list of third_parties

Test: None
Change-Id: Id390c6c53f619b7bc87c80ae08acca9ee3a65c2e

Test: None
Change-Id: Iaa00d4d383f84fbabe346cbe9a929ba471d68297

Test: None
Change-Id: Iba6f410c23bdabbb5559772039b4242965e720a7

Bug: 297482971
Test: TH
Change-Id: I6f2cdd066d9047b113ff80211cf6d4c6fa605104

This CL also updates not to use isTetheringFeatureEnabled for
TETHER_FORCE_UPSTREAM_AUTOMATIC_VERSION which is wrongly configured in
Connectivity namespace.

Test: m
Bug: 279108992
Change-Id: If4f3a57c749bbaeb85454c31248c5bc5feaab936

Bug: 298729534
Test: atest com.android.cts.net.HostsideConnOnActivityStartTest
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:eaf030ea96f3af817e8b301c8edf48f79d7f229d)
Merged-In: I58a23e927cd14b973048e34566350eeef215f7db
Change-Id: I58a23e927cd14b973048e34566350eeef215f7db

framework-connectivity-t-mdns-standalone-build-sources should only be
used for building service-connectivity-mdns-standalone-build-test. Added
comment to prevent this filegroup being used in wrong way.

Test: TH
Change-Id: I11dd390967db1a115dcadcdebc20f226ab6c0a51

Test: -m
Fix: 292812342
Fix: 297413048
Fix: 214879640
Ignore-AOSP-First: merge conflicts, need to be merged in downstream first
Change-Id: I7efa92469f0c061a972a7dadf6a38686b78c61b4
Merged-In: I7efa92469f0c061a972a7dadf6a38686b78c61b4

Verify that the extra info for validation logs in the
NetworkInfo is set.

Bug: 297790570
Test: atest FrameworksNetTests
Change-Id: I5b77b3bab30154b7979cda003274cde0d834a5fb

Test: TreeHugger
Signed-off-by: Maciej Żenczykowski <maze@google.com>
Change-Id: I399ac8dfc4992f4c604f1d32c2f1b8ae06710808

Test: TreeHugger
Bug: 291025434
Bug: 289802481
Bug: 294510745
Change-Id: I3c9646468834305e48c531040640e05f80b1c5e7

This allows using assumptions to skip tests.

Test: atest CtsHostsideNetworkTests
Change-Id: Ic1fc41c1ca0c30b6b7350c413d710d959b9a5013

Test: test-only change
Change-Id: If3702cf9c3a36e3b7cb1853784f1a8ff98d7be07

Report more advertising metrics data below when the service is
unregistered.
- Replied request count (sum across interfaces)
- Sent packet count (including announcements and probes)
- Number of conflicts during probing
- Nubmer of conflicts after probing

Bug: 287546772
Test: atest FrameworksNetTestCases NsdManagerTest
Merged-In: I50c54a35dc523422e3a7302c059bbbc38eac5631
Change-Id: I50c54a35dc523422e3a7302c059bbbc38eac5631

There was no such method in R release, use SdkLevel to check
framework version and use different API accordingly.

Test: TH
Fix: 297768044
Change-Id: I357c0d56646ffd5eb018b6bb4efe47d4c48e71d3

Per RFC6762#10.1, the cache flush bit should be false for
existing announcement. Otherwise, the record will be deleted
immediately when receiving this response.

Bug: 299054783
Test: atest FrameworksNetTestCases NsdManagerTest
Change-Id: I8bf1a5b1914b49720862836abb543b232185f5f5

Add the missing logic to send the rawOffloadPacket to OffloadEngine.

Bug: 297314970
Test: atest CtsNetTestCases FrameworksNetTestCases
Change-Id: I06d7a9bb84df72808eff4f0c9df60f7e60aa2a2c