ma_listener: correct bounds of array

crashed by array index out of bounds.

Bug: 79468907
Bug: 79472606
Bug: 79495729
Test: manual audio test rington/music/alarm/notification

Change-Id: I327ef3b77c7c65064b67dfdc3404cf59d5d84203
Signed-off-by: Jasmine Cha <chajasmine@google.com>