Previously only METADATA_KEY_ALBUM_ART_URI/ART_URI were set, leaving notification/lock-screen/Android Auto consumers to resolve the cover art themselves. Likely due to internal scaling, a lower quality bitmap was loaded.
This commit adds a shared resolveUriAsBitmap() helper (extracted from AbMediaDescriptionAdapter.kt) and uses it to:
- Resolve and cache a bitmap on PlaybackSession once per
session (synchronously for local covers, asynchronously for server covers), then set it on METADATA_KEY_ALBUM_ART/ART once available, falling back to the URI keys until it resolves.
- Reuse the same helper in AbMediaDescriptionAdapter so the notification icon is resolved consistently.
PlayerNotificationService tracks the resolution Job and cancels/replaces it on each new playback session, invalidating the media session metadata once the bitmap is ready.
