Merge commit 'b987146123879217a6cdcdfeffdddd917edb22cc' * commit 'b987146123879217a6cdcdfeffdddd917edb22cc': Register ServiceStateChanged to CallManager.
Merge commit 'b987146123879217a6cdcdfeffdddd917edb22cc' * commit 'b987146123879217a6cdcdfeffdddd917edb22cc': Register ServiceStateChanged to CallManager.