-Add test cases Bug: 147395289 Test: make -j42 RunSettingsRoboTests Change-Id: I7a3a2312e5f777cc22afb7a33df52afcc7707dc7
1. Add RemoteVolumePreferenceController to control volume through MediaSessions. 2. Add related preference to skip calling AudioManager. Bug: 126199571 Test: RunSettingsRoboTests Change-Id: I9cb85ccf5f49be6d127cb61caf445b2ee7dfb579