AVRCP: PTS CT Pass-through cases for Volume level changes

PTS AVRCP CT Test cases:
- AVRCP/CT/PTH/BV-01-C
- AVRCP/CT/PTH/BV-02-C
- AVRCP/CT/PTT/BV-02-I
Where CT to send volume level changes in the form of pass
through commands.

CRs-Fixed: 2239544
Change-Id: If39db82c68779f8960ad78341df704a9ac4bc1e5
1 file changed