Enable NSRM (Network Socket Request Manager).

NSRM is a feature to synchronize app socket requests
to reduce network signalling and there by save power.

Change-Id: Ic34b9c54404ba2156701da1f63232013978bf3a4
CRs-Fixed: 997493

Fix: Added safe check to prevent app crash.

PowerManagerService instance with respect to NSRM is
not handled properly which results in application crash.
Safe checks are added to prevent crashes.

Change-Id: I4ab69e85b1f0a7a4d018b844f4e3dc7f6e1410e8
CRs-Fixed: 1051580

Adding Synchronization for PowerManager mWakeLock.

Race Condition was causing Runtime Exception in
PowerManager.Lock Variable named mWakeLock. It was
occuring while releasing mWakeLock. So Adding Synchronization
Mechanism to Fix this Issue.

CRs-Fixed: 1017355
Change-Id: Ic0376b702298fa45e0d1cc426abb64933bfaa8dc