SystemUI: Update Ringer tile code.

Fixed the issue when ringer tile shows not correct ringer state.

Change-Id: Iddf7122d66a86caa032b026919857ccb0fa33497
Service: Keep services needing restart.

Services needing restart after crash include:
1) service with 'persistent == true'
2) service explicitly reuqired restart by returning START_STICKY
   or START_REDELIVER_INTENT from onStartCommand

Change-Id: Icda43d349faf344a8d022fc4ec5e928ec3399036
Merge "Service: Keep services needing restart." into cm-11.0
Merge "SystemUI: Update Ringer tile code." into cm-11.0
Merge remote-tracking branch 'cm/cm-11.0' into cm-11.0