Revert "Remove provisioning dialog from wifi-tethering"

This reverts commit 81ca3dd4.

Reason for revert:
This breaks carrier requirement to show error dialog/roaming warning.
Will make an entitlement app change to suppress the progress dialog
so that if the entitlement check succeeds no dialog will be shown
in most cases.

Bug: 78680359
Change-Id: I98d2aa5cc676308b1e2d16bf877dc6878a7bf4cb