Merge "[DOC UPDATE] Refine extension strength default" into udc-dev am: 79e749d49b am: 112a8a34da

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

Change-Id: Ifa0b84a448c217dd0ea760962a411c72a49b09bd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>