ril: Add Samsung-specific unsolicited commands

 * This is shamelessly stolen from the Exynos RIL, but it's relevant for
   JF now. Without a proper response to the WB_AMR query, audio fails in
   strange and unusual ways.

Change-Id: I9f37c7b82e9b171479847a24ff3a1e10ada973bd
Merge "ril: Add Samsung-specific unsolicited commands" into cm-10.1