Fixing test_attributes_aaudio_system_usages_rejected

This test can encounter two errors: one for the system usage not being
supported by the device, and the other from the caller not having the
MODFIY_AUDIO_ROUTING permission to use the system usage. Updating
assertion to reflect this.

Fixes: 154936127
Test: atest AAudioTests
Change-Id: If73c2af797a93e7071e1fd0469e0801b0c15300e
1 file changed