audiopolicy: fix accessibility service capture

Commit 589171c8 introduced a regression when an accessibility service
is capturing with UI on top and using an audio source different from
VOICE_RECOGNITION or HOTWORD.

Bug: 140072679
Test: repro steps in bug
Change-Id: Ia322f801066b9ec0cc4afa8d6c5e8296e9ecb1cc
1 file changed