Unfotunately there are two different RTP formats for HR GSM specified
and it is unclear which should be used with GSM networks. Also esch BTS
model may have a preference for either one or the other format.
Lets set internal flags to determine the preference for each BTS model
and then lets use this information to convert incoming RTP packets into
the prefered format. Doing so we will make sure that always both formats
are accepted.
Change-Id: I17f0b546042fa333780fd2f5c315898ab0df574c
Related: OS#5688