Merge "Don't change the voice interactor setting if it's explicitly unset." into rvc-qpr-dev am: 8b6f7f10f0

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/13234020

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I03779bf004129f03424e6f9af8d75c782965345b