Revert "Frameworks: port SlimSeekBarPreference to SlimLP"

This reverts commit 1095c308b8fcf58199cf90aa4c0ae2b5e91c430b.

(cherry picked from commit 75278efd72ba5fcd6d66248a632974c2a7659e06)
Fix volume key music controls and wake up

- Forward port code from cm-11.0 and adjust for 5.0
- Fix not being able to adjust volume when music control is on
- Disable screen off volume/music control when wake key is enabled

Change-Id: Ie0ad83965c41fd33120490c25a4ff3d9b2cbeb37

Conflicts:
	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java

(cherry picked from commit 47e38b1e270ca57acd2a8592ffc7a8fdf41cd27c)