[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