audio: Fix ServiceUtil permission util uid

We check the calling uid for the permission helpers for
MODIFY_AUDIO_ROUTING and MODIFY_DEFAULT_AUDIO_EFFECTS which take an
attribution source, which is incorrect.

Change to using the passed uid.

Test: CtsMediaAudioTestCases
Bug: 360389515
Flag: EXEMPT bugfix
Change-Id: I7a94328847071a4af5d160711607b8ee55458a13