am f1b1eec9: Merge "SipService: mScreenOn is flipped to wrong value." into gingerbread

Merge commit 'f1b1eec9de1ca27b660f6c00487de07a30eecf64' into gingerbread-plus-aosp

* commit 'f1b1eec9de1ca27b660f6c00487de07a30eecf64':
  SipService: mScreenOn is flipped to wrong value.