* Rename (via deprecation)
`MediaItem.DrmConfiguration.Builder#forceSessionsForAudioAndVideoTracks`
to `setForceSessionsForAudioAndVideoTracks`. This is more consistent
with existing 'force' method names both in this class and in
`TrackSelectionParameters.Builder`.
* Add missing `@Nullable` annotation to the parameter for
`MediaItem.SubtitleConfiguration.Builder#setMimeType`. This annotation
is already present on the `MediaItem.SubtitleConfiguration#mimeType`
field that this setter corresponds to.
PiperOrigin-RevId: 450941336
