Merge "lint: update documentation on how to update the baseline" into main am: bc9d6797

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2815153



Change-Id: I10936f3dedff84667188827f6d6ad54040160b22
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>