[1/2] Navigation bar IME cursor control: option to disable
Revert "Base: add OmniSwitch NavBar shortcut (1/2)"

This reverts commit 8876108da53f669c6af9aaff0e5f23d18d471090.

Conflicts:
	core/java/com/android/internal/util/mahdi/ButtonsConstants.java
	core/java/com/android/internal/util/mahdi/ButtonsHelper.java
SlimActions: add new actions and cleanup

A bit cleanup.

As well add 4 actions:

- camera intent
- play/pause music
- next music track
- prev music track
- wake up device

As well check for system ready on the other audio actions which are already present.

ToDo: One of the rare classes which are very bad documented. We need to add code comments
ASAP

Change-Id: I73bcfb6c60454de4d8494dfd846deee770022335

Conflicts:
	core/java/com/android/internal/util/mahdi/MahdiActions.java