Fix now-playing UI showing wrong song (issue #24)

[chamika]

Fixes #24

Problem

The AAOS full player screen and the browse "now playing" indicator occasionally disagree about the current track — sometimes the player shows the previous song while the browse view shows the real one, and sometimes the reverse. It's intermittent and happens in both directions.

Root cause

This is a sync/timing bug, not a wrong-value bug:

• Browse items and queue items both go through the same MediaItemFactory / MediaRepository.toMediaItem() path, so a given track always has identical title/art.
• Media3 precedence is in our favor — Player.getMediaMetadata() populates MediaItem.mediaMetadata on top of media-derived metadata, so our title always wins. In-band ID3 can never substitute a different song's title.
• DashTune streams Jellyfin's transcoded MP3. ExoPlayer's Mp3Extractor parses the embedded ID3 tags and fires an extra onMediaMetadataChanged shortly after each transition, re-publishing MediaMetadataCompat to the legacy MediaSessionCompat bridge. When a late ID3 event for track B interleaves with the transition to track C, the two AAOS now-playing surfaces refresh on different events and end up disagreeing.

Fix

Disable ID3 metadata extraction on the MP3 streams. The app fully owns now-playing metadata via MediaItem.mediaMetadata, so the in-band ID3 pass is pure churn — removing it collapses each transition to a single, clean metadata publish.

Also adds an onMediaMetadataChanged debug log to confirm, in a reproduction, that each transition now yields exactly one metadata change matching the current item id.

No new Gradle dependency (extractor ships transitively with media3-exoplayer 1.9.2).

Verification

• ./gradlew :automotive:assembleDebug builds cleanly.
• On-device: play an album/playlist, let it auto-advance and rapidly skip Next/Previous, and confirm the full player title always matches the highlighted browse item. logcat should show exactly one onMediaMetadataChanged per transition with currentId matching the title.

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