[automerger skipped] [RESTRICT AUTOMERGE] [Provider Model] Internal cleanup - remove Provider Model flag and deprecated legacy UI part.5 am: a582bb1092 am: baa1b112fd -s ours

am skip reason: subject contains skip directive

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/16475181

Change-Id: I41a5e05400565f76d3c3d42e221a1a65bdf8fecc