This simplifies the addition of new fields in the future.
Also do some misc clean up for the volume limit values:
- Add some documentation to mention assumed defaults
- Add the IntRange annotations to match the ones we have in Player
already
- Mention the limits in the relevant Player methods
- Avoid bundling default values
- Improve range checks for masking in MediaController
PiperOrigin-RevId: 526029619
d9fd8f4310