Don't animate the circle battery meter when battery is fully charged

Rotating a full circle is unnecessary, no need to redraw the battery
meter every 50ms

Change-Id: Ibc7232ccd296ddbcf7c920aa6d8f01baa92a06d7
Merge "Don't animate the circle battery meter when battery is fully charged" into cm-11.0
Merge pull request #9 from CyanogenMod/cm-11.0

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