AudioDeviceBroker: fix UID comparison for phone/bt process for HSUM

Compare app UID instead of UID to account for HSUM platforms where
the main user is not user 0.

Bug: 370537688
Flag: EXEMPT bugfix
Test: MT/MO call with SCO on
Change-Id: Ib702c7304d1873480b5e7acd9c5ba039fc6ad47b