Merge "Add key ACCESSIBILITY_FONT_SCALING_HAS_BEEN_CHANGED" into udc-dev am: 1bcc280a am: 010e7393

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/21571009



Change-Id: I18df864d8148eff0505b4a457565ff5eb9556e47
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>