avrcp: handle GetPlayStatus pdu
avrcp: handle GetPlayStatus pdu

Example response for PTS test TC_TG_MDI_BV_02_C:

> ACL data: handle 11 flags 0x02 dlen 17
    L2CAP(d): cid 0x0043 len 13 [psm 23]
      AVCTP: Command : pt 0x00 transaction 2 pid 0x110e
        AV/C: Status: address 0x48 opcode 0x00
          Subunit: Panel
          Opcode: Vendor Dependent
          Company ID: 0x001958
          AVRCP: GetPlayStatus: pt 0x00 len 0x0000
< ACL data: handle 11 flags 0x02 dlen 26
    L2CAP(d): cid 0x0043 len 22 [psm 23]
      AVCTP: Response : pt 0x00 transaction 2 pid 0x110e
        AV/C: Stable: address 0x48 opcode 0x00
          Subunit: Panel
          Opcode: Vendor Dependent
          Company ID: 0x001958
          AVRCP: GetPlayStatus: pt 0x00 len 0x0009
            SongLength: 0x0000a7f8 (43000 miliseconds)
            SongPosition: 0x00012fad (77741 miliconds)
            PlayStatus: 0x01 (PLAYING)

pkarasev3/bluez,mapfau/bluez,mapfau/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,mapfau/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,ComputeCycles/bluez,pkarasev3/bluez,pkarasev3/bluez,silent-snowman/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,silent-snowman/bluez,ComputeCycles/bluez