AVRCP Controller Media Controller not ready

Flip two lines of code to ensure that the media controller is set before
updating the available actions.  Prevents a race condition where a media
player responds to a media state change before the controller is
available.

Bug: 147469352
Test: Inspection (And many on off cycles)
Change-Id: I2aad90c1028ab0ca81da09233e7fb49bf18d89c9