Expose in SDK the interfaces necessary to implement unbundled
subtitle support, which requires:
- exposing an interface to receive the encoded subtitle data
- exposing an interface while allows a renderer to synchronize
its rendering clock with the media time of the player.
Deprecate duplicated timed text constant, all timed text / sub
mime types are defined in MediaFormat.
Bug: 76121592
Test: make offline-sdk-docs
Change-Id: I42cc1d69069babb69a2feeba3f54da89889f4602
If a developer extends an existing ParcelableSpan and overwrites
writeToParcel, TextUtils will crash when attempting to unparcel
since the span type ID is not accurate. This CL makes a separate
framework-private method for writeToParcel to ensure that even if
a developer extends a ParcelableSpan class, they won't modify the
parceling or unparceling code that's tied to the span type ID.
Bug: 21274544
Change-Id: If4c3506a55999df7a3b6d87cb8d550235d7a02c6
