[SimlarService] now uses high performance wifi lock
[CallActivity] proximity sensor continues processing even if distance value is out of range
[CallActivity] proximity screen lock now enables fullscreen, disables navigation bar and changes view visability
[ProximityScreenLockerFallback] moved proximity sensor handling here
[ProximityScreenLocker] added interface
[ProximityScreenLockerNative] added class to capsulate undocumented native proximity screen off wake lock
[CallActivity] now uses ProximityScreenLockerNative if supported
[ProximityScreenLockerHelper] moved creation of native or fallback ProximityScreenLocker here