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
76788f0bd0