Hide overlay windows when showing phone account enable/disable screen. am: a7d57ace58 am: 03d32b7ee6

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/20069028

Change-Id: I2a09af6cf6436eb48c16f99af55cc37217093601
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>