Add checkMobileProvisioning to ConnectivityService.

Bug: 9279964
Change-Id: I42c326a21e05aa301e9d974ed9ac1d59472780ec

Conflicts:
	core/java/android/net/ConnectivityManager.java
	core/java/android/net/IConnectivityManager.aidl
	services/java/com/android/server/ConnectivityService.java