MediaSessionConnector - metadata for Samsung

[izderadicka]

Issue description

I use TimelineQueueNavigator with my media application on Samsung phones.
Queue get MediaDescriptionCompat from queue and maps it to MediaMetadataCompat which is then set in MediaSession.
The main infomartion about media item is its title - now comes interesting part - connector maps description title into MEDIA_KEY_DISPLAY_TITLE key, but Samsung (in lock and AOD screens) does not care about this key it but looks only for MEDIA_KEY_TITLE key.
So on Samsung phone I see "Unknown" on AOD and lock screen when my MediaSession is active.

Solution would be to set both MEDIA_KEY_DISPLAY_TITLE and MEDIA_KEY_TITLE in updateMediaSessionMetadata method to fix this Samsung issue ( theoretically its their problem, but they are still big player and it's probably fair to expect MEDIA_KEY_TITLE to be always present and use the other one as an alternative)

I hope my description is not too confusing otherwise please let me know and I can provide some more details.

Reproduction steps

Use app in Samsung

Set to use Lock screen - e.g. lock at least to swipe

Look on Lock Screen or AOD screen media controls

Version of ExoPlayer being used

master

Device(s) and version(s) of Android being used

Samsung specific - N and O versions

[DKillWorld]

This happenes on certain more devices I tested with. Certainly needs some quick fix.