overlay: increase mms size limit

Change-Id: If2689aa85c13f3f808c8b54dc0f7ea4e922e2b48
telephony: show apn settings

Change-Id: Ib439e90eeee33c681253d5c72292a3887c679ff0
Merge remote-tracking branch 'upstream/cm-12.0' into lollipop