Updates to the playback debug overlay (#1290)

## Description
Lots of minor changes to the debug overlay

- Adjusts the size and layout 
- Smaller font size
- Only shows selected tracks by default
- Expanding tracks are scrollable and don't cover controls
- Show (estimated) network bitrate
- Show heap memory usage
- Better controls/chapters/queue animations
- Minor optimizations

Dev note: There's lots of code reorganization too

### Related issues
Related to #1216
Related to https://github.com/damontecres/Wholphin/issues/528

### Testing
Emulator & nvidia shield

## Screenshots
### Selected tracks
<img width="1280" height="720" alt="overlay1 Large"
src="https://github.com/user-attachments/assets/e6ef71f5-73ef-4947-8b2a-0f41f64ef019"
/>

### Expanded tracks, scrolled down
<img width="1280" height="720" alt="overlay2 Large"
src="https://github.com/user-attachments/assets/2e655f7e-7331-42dd-a572-0173b06563a8"
/>

### Transcode info
<img width="1280" height="720" alt="overlay3 Large"
src="https://github.com/user-attachments/assets/3081e2ec-bb9e-422c-b833-c22785c649bf"
/>

## AI or LLM usage
None

app/src/main/res/values/strings.xml

@@ -767,6 +767,7 @@
     <string name="ass_subtitle_mode_exoplayer">Direct play with ExoPlayer built-in</string>
     <string name="ass_subtitle_mode_transcode">Burn in/transcode on server</string>
     <string name="ass_subtitle_playback">SSA/ASS subtitle playback</string>
+    <string name="show_more">Show %1$s more</string>
     <string name="skip_behavior">Skip behavior</string>
     <string name="skip_behavior_summary">For intros, credits, etc</string>
     <array name="ass_subtitle_modes">