Merge "Remind the reader that they'll need to modify CTS too." into main am: 293b394508

Original change: https://android-review.googlesource.com/c/platform/system/core/+/3262151

Change-Id: Idbce9dba4e5d516528b2553f7bc228ad46005c00
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>