Active display: Add sunlight mode. [2/2]

Change-Id: Id4bacfc72caa9fb7bfe85561a1db9d4f18524d89
Optimized all png's.

Change-Id: I8660155a5464f07223927abe694416fbf540c29e
to: optipng -nc -nb -o7
Add battery bar. [2/2]

Change-Id: I252bda0d98191a76528cb8a212ef1ef60c4f0cf2
Settings: Recents RAM bar (2/2)

due that the old rambar was resource consuming and as the settings rambar not really
right in showing the truth of real RAM usage in android, I decided to go new ways.

This commit changes our rambar (or better add a total new one) in following points:

- we do not use any longer ther permanent observed RunningState machine
- instead we read out /proc/meminfo (thanks steven for that idea)
- rambar shows now the real memory usage
- ppl have the possibility to show applications, cache and other ram usage as they like
- deeper explanations I add how android mem managment works.
- color picker for all rambar states
- reset to default
- updates only on actions on recents so that it is making sense
- and a lot other

cheers

Change-Id: Ic6beae61627ca054441817655dd742f3285c9094