Enable NSRM (network socket request manager)

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

Change-Id: Ice992713994045d0582f8cfb7b6761e2689f2555
Conflicts:
services/core/java/com/android/server/AlarmManagerService.java

Conflicts:
	services/core/java/com/android/server/power/PowerManagerService.java