serrano3gxx: Add init.carrier.rc

Change-Id: I06c39db53d6e3e8ef2cf5616f975d537957aab62
serrano3gxx: Add prop for rild.libpath

Change-Id: I282cfa6e6e97dc2bf38cf6a56d3111dcb3436a08
serrano3gxx: Consolidate vendor blobs

Change-Id: I43a33dcc1359b1237cedf26ea744b34f00ba486a