Refactor sound setting -> work profile initialization logic.

Refactor sound setting -> work profile initialization logic.

- Some formatting change
- Merge work profile sound settings into main sound setting xml file, and
  use existing WorkCategory to host it. This category automatically hides
  everything within if user is not using work profile.
- Remove logic for manually populating work profile sound setting into
  the UI, thus removing the animation glitch when expanding advanced
  button.

Change-Id: I90459e5cd1d3d20a97ea3629e143ebf13dbd0f76
Fix: 35959624
Test: make RunSettingsRoboTests