TIAF: unhide APIs of setup session use case

Sequence diagram of the use case:
https://screenshot.googleplex.com/4qAsMgdCD6itwWj.png

Bug: 208651889
Test: atest android.media.tv.interactive.cts.TvInteractiveAppServiceTest
Change-Id: I89a2d7c00256669be74cf891ed9bdea2b41b8309
7 files changed