Merge "Update code comments to mention sensor name uniqueness." into sc-dev am: 5f9e20b3 am: be55a14c am: 4794a956

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/14987633

Change-Id: Id0d10eb677ab427070f6a0215ecdf0db5119bb27