The feature will always be available, even for users who disabled it
on Beta 1.
Bug: 160826507
Test: manual
Test: MediaControlsParentPreferenceControllerTest
Test: MediaControlsPreferenceControllerTest
Change-Id: Ia2835e7c8156d753a8f8fbf248f2509003309fd2
Adds a toggle under Settings > Sound > Media to toggle media resumption
Bug: 154039093
Test: manual
Test: atest SettingsProviderTest
Test: make -j40 RunSettingsRoboTests ROBOTEST_FILTER="MediaControls"
Change-Id: I803c57031bc3252cab35c06ea124d1c22a3c3aeb