Merge "Revert "Mainline: removed legacy UI for network selection mode."" into rvc-dev am: 518ffd7c am: 58d36c2d

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/apps/Settings/+/11837795

Change-Id: Ic51904ec93d5ed3417bb81b3d67c8f7b1ddb1dab