Organize media control classes

Move current media control classes under a new package,
systemui.media.controls, with sub-packages
- models (player and recommendation card types)
- pipeline
- resume
- UI
- util

Test: build
Test: atest com.android.systemui.media
Bug: 241485754
Change-Id: I32667f50b1d35f2f807b8d437042a2d5c390e649