Property constants declaration for OMH

Added RIL request declaration to query OMH profile
Added event to be broadcasted on OMH profile read complete

Conflicts:
	telephony/java/com/android/internal/telephony/RILConstants.java

Change-Id: Idfeb2f3f1a3aa0403a7ff0ab7c69fc945d9e7083
Conflicts:
telephony/java/com/android/internal/telephony/DctConstants.java