tree bbf0f3a62fda02df889b920b9f698c1e04a3df82
parent 8ffa1fe8b01d2426f406d79e4c806111aaf7ce4d
author Yao Chen <yaochen@google.com> 1502924621 -0700
committer Hongwei Wang <hwwang@google.com> 1504627882 -0700

Cherry-pick and manually resolved the conflicts.

Note that this is a cherry-pick of ag/2745105 and there is no intent to
modify the original CL except for conflicts resolving.

Map the VehicleAudioContextFlag.UNKNOWN_FLAG to current context.

    + When vehicle hal is reporting volume change on unknown context, we
      will map it to the current context. This makes partner's
      implementation easier and our volume handling more robust.

    + Added test.

Bug: 62064580
Test: runtest -x packages/services/Car/tests/carservice_test/src/com/android/car/test/CarVolumeServiceTest.java

Change-Id: I488967e48e96f15f0094337282ef0b6f25465754