Draft: Detect and Concat CDMA WAP messages
WAP messages can be sent on CDMA in additiona to WCDMA, but the existing multi-message concat logic is only implemented for WCDMA. For CDMA, the multimessage sequencing information is part of a 3 byte header at the beginning of the user data, as described in section 6.5.2 of http://www.openmobilealliance.org/tech/affiliates/wap/wap-259-wdp-20010614-a.pdf.
Additionally, we message-id is the same for all parts, so I re-use the existing concat methods but with message-id as the reference.