Merge "[Regional Preference] Do not get child fragment if the fragment is not...

Merge "[Regional Preference] Do not get child fragment if the fragment is not added" into udc-dev am: d6fb2c45

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/22789043



Change-Id: I8c187cfc4301af169454bcc4fe15877134c6035c
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>