Fix receiving multi-part CDMA WAP messages.

Fix ArrayIndexOutOfBoundsException in CDMA WAP message handling.
Add a new flag to raw DB table to indicate 3GPP2 WAP PDU messages.
Use the new flag to return the correct value for getIndexOffset()
in InboundSmsTracker.

Previously this only worked correctly for single-segment WAP PDUs
of type WAP push.

Bug: 10595053
Change-Id: I8820da124e8fa4707cbee0398690a475d26ff702