[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