Configurable Audio Policy: Various fixes

-- Update pre-compiled xml files due to a misalignment with
   EDD files from previous bug fixes.
-- Add support for AUDIO_USAGE_ASSISTANT in engineconfigurable.
-- Fix UsbDevice select for strategy accessibility.
   Volume cannot be changed when play music via UsbHeadset.
   Strategy accessibility selects Speaker instead of UsbHeadset
   This corrects the device selected by accessibility strategy.
-- Fix Sonification respectful with A2DP devices issue.  No
   notification sound is heard on BT A2DP devices.  This
   corrects the applicable list of audio output devices in
   case of Sonification Respectful strategy.

Bug: 37157254
Test: built angler with CAP enabled
Change-Id: Ie6b401d28d3211846bb2b5345509d80f31440708
Signed-off-by: David Brageul <david.brageul@intel.com>
Signed-off-by: Mohamed LAHMADI <mohamedx.lahmadi@intel.com>