TIAF: unhide playback command and remaining public APIs

Bug: 213836031
Test: atest android.media.tv.interactive.cts.TvInteractiveAppViewTest
Test: atest android.media.tv.interactive.cts.TvInteractiveAppManagerTest
Test: atest android.media.tv.interactive.cts.TvInteractiveAppServiceTest
Change-Id: Iad7130f70d892b0ccb3bab1fbf6e59784d6a5975
7 files changed