This change adds the ability to update the error code of the PlaybackStateCompat in
cases we need this for backwards compatibility. It is applied in the least
intrusive way because normally, return values of a service method should not change
the state of the `PlaybackStateCompat`, just because it has nothing to do with the
playback state but rather with the state of the `MediaLibrarySession`.
For this reason only the error code `RESULT_ERROR_SESSION_AUTHENTICATION_EXPIRED`
is taken into account while all other error codes are not mapped to the
`PlaybackStateCompat'.
PiperOrigin-RevId: 438038852
Some strings didn't mention the context in which they are used
(for example as item in a list, or for accessibility). This makes it
harder for translators to choose the most appropriate translation and
grammar.
Also fix repeat and shuffle mode button accessibility descriptions to
indicate the action, not the current state.
PiperOrigin-RevId: 426924163
