MMS: Handle case when mobile data is not available

mmsNetworkInfo is null on APQ targets where mobile data is not available
causing a null pointer crash

CRs-Fixed: 517339

Change-Id: I2522d9da3cea1599d7b865e12134b508b636bde9
Mms: Clean up delivery report dialog.

Instead of launching another activity just to show the delivery report,
mimic how showMessageDetails works instead, using AlertDialog.Builder.
This ports the dialog over to Holo as well.

Change-Id: Ia7ee549fe7ed9770a70482a042ebbc4bc12bab21
Signed-off-by: angelsl <hidingfromhidden@gmail.com>
Merge "Mms: Clean up delivery report dialog." into jb43