Merge "Document a section of code" am: 7c37904142 am: 5859be6c51

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2055047

Change-Id: I1a4345554c80510e0256e75dda13f69ae3f8ef16
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>