Reapply "Implement Start/Stop Playback APIs"

As the build has cleared on the target that previously caused on the revert, should be safe to resubmit: https://android-build.corp.google.com/build_explorer/branch_dashboard/git_main-without-vendor/build_id/P66757989/?activeTarget=aosp_arm64-trunk_food-userdebug

Bug: 302596906
Test: mmm
Change-Id: If69cf64baf6359ad5a9c2ed1c6c7b3bee29a1f03