Merge "Document a section of code" am: 7c379041 am: 5859be6c am: 09eb6c1a

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



Change-Id: Iee7b4a1a288e161a46be7e7a5b52fc318f4e868c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>