Merge "[Panlingual] Remove featureflag of app language." into tm-qpr-dev am: 34cb6d3237 am: a18ec335a9

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/19674012

Change-Id: If2e0c2b9b4d8e981ea42eeea4ebdbe0617f998cd
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>