[Settings] Add custom circle battery options (2/2) - SlimBean

new slim feature

- custom circle color
- custom circle text color
- custom animation speed
- compatibel to all themes from theme engine
- option to reset it to theme behaviour

Patchset 2

- rebased

Change-Id: I0b0953f2c9fe45599c20e00024a1d43fb55fe868

Conflicts:

	res/values/strings.xml