Merge "[DOC UPDATE] Refine extension strength default" into udc-dev am: 79e749d4 am: 1fb99904

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/24344720



Change-Id: I428158dca57e23fc71c3428b30d6d3889bdef029
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>