3960ced4638fdb24ddf904fcb6734dae0959671e
There were a few places where we were not sending SMS ack. This change fixes that, and helps ensure that we don't miss any others. Also fix a bug I introduced in RIL.java for CDMA SMS ACK (it uses RIL_CDMA_SMS_Ack and not int[]).
Added info about mcc and mnc, plus other changes per http://b/1918247; rewrote "How Android find best match" section per rgreenwalt's comments and added flowchart.
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