AVRCP: Fixes wrt to player switch for various players

- Keep a static whitelist of Browsable players for 
AVRCP_Browse feature as many of the player claiming
support Browsing indeed misbehave and doesn't allow
MBS Connection via BT OR partially support Browsing
features.

- Disallow sending browse events CHANGED response for
non-Browsable to non-Browsable player switch.

- Ensure Browsable feature bits are not set for non-
Browsable Players.

- Ensure Now_playing_content change and non-zero track
value is sent for Browsable Players only.

CRs-Fixed: 2539461
Change-Id: I61f22cf1d34542770fb24497d337b0f7b65fa244