audio: adjust the digital gain for speaker-mic am: 1a8281331d am: aa981420a2

Original change: https://googleplex-android-review.googlesource.com/c/device/google/raviole/+/17899773

Change-Id: I4f3d76e6bd53edf7e6a0202c4a5dc992d242faeb
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>