Grab all packages that support browsing instead of connecting to them one by one

This prevents sending an excess amount of Available Players Changed
notifications.

Bug: 34471252
Test: Connect to carkit and switch players, see that number of addressed player
      changed notifications is consistant with boot time
Change-Id: Ic9409dc262f951cd22a5eb44cf2c44e0375908de
(cherry picked from commit dde97e79)