APM runtime setting: fix kPlayoutVolumeChange not dispatched
APM runtime setting: fix kPlayoutVolumeChange not dispatched

Bug: webrtc:10608
Change-Id: Ied2e8db1f9914217c6001e0da79c19e2b414056d
Reviewed-on: https://webrtc-review.googlesource.com/c/src/+/159560
Reviewed-by: Gustaf Ullberg <3619ad972adf2eeb42172b0d9b4d612d59d226c7@webrtc.org>
Commit-Queue: Alessio Bazzica <eed802d553432598d8dd1392efc4d65b5eefde4d@webrtc.org>
Cr-Commit-Position: 972c6d2dc6dd5efdad1377c0d224e03eb8f276f7@{#29755}

ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,TimothyGu/libilbc,ShiftMediaProject/libilbc,ShiftMediaProject/libilbc