AVRCP: Play status mapping issue involving Fast Rewind

Bluetooth media browser service was getting play status for
fast rewind as "STATE_FAST_FORWARDING" even if fast rewind was in
progress. The reason was improper mapping of the JNI event in
AvrcpControllerService.java. The fix is done by adding the
proper value for the play status of fast rewind.

Test: Manual testing by pressing fast rewind and checking for
the play status.

Change-Id: I0b3c19fb7f5881fcda921d909a1a578285f4263f