Merge "Deprecate fonts.xml and add hidden font_fallback.xml" into main am: a6fac5d6c7 am: 38d368a926 am: f6aa44a3c4 am: 81808d8d02

Original change: https://android-review.googlesource.com/c/platform/frameworks/base/+/2670877

Change-Id: I3146b6daa14dbfddba59096851ac148ec20b23a9
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>