Update dialog to edit user info

This CL includes replacing AlertDialog used in EditUserInfoController class
with dialog from CustomDialogHelper class that has an updated layout.
Tests are updated to comply with new layout of the dialog.
Minor changes made to code to better work with this update.

Bug: 280568195
Test: atest EditUserInfoController
Change-Id: Ic93887eebf85757e50b4ccdcf2ba24f338763ae8