Added Android user id based audio routing.

Added Android user id based routing. Added API to defined and removed
user id based routing. The APIs are based on the applications uid based
routing. The logic for user id based routing also largely resembles the
application's uid based routing.

Bug: 139365417
Test: atest
com.google.android.gts.audio.AudioHostTest#testUserIdDeviceAffinity
Test: atest AudioPlaybackCaptureTest
Change-Id: I1f458680c96439f047829d5b2a5d1f0d37be60bd