AppOps: Fix mms control in AppOps.

Add support to check user permission before sending MMS.
Also seperate out SMS operations from MMS operations.

CRs-Fixed: 549192
Change-Id: Ia5b73e6b6a2c48b608a0ef1d199429c6c0e21f75

Conflicts:
	core/java/android/app/AppOpsManager.java
	core/res/res/values/config.xml
AppOps: Add null pointer check for USERAGENT parameter.

Fix the Java exception which is caused by null pointer issue in
AndroidHttpClient.

Change-Id: If7e36298f94ca164b87e1b0604f49156bdfd4513