Audio policy: uid device affinity deterministic rule

When setting a uid device affinity, make the rules deterministic
  by applying an "exclude" rule on all mixes that don't reach
  the devices (existing), but also a "match" on the mixes that
  do (new).
Bug: 111647296
Test: requires device with routing policy started by CarService

Change-Id: I3bb844156ade75e4b9576c1e18200ca90ce26cf9