Add temporary link to PermissionController for new default apps UI.

This change adds a temporary link in the default apps settings to
allow launching the new default apps UI in PermissionController during
the process we migrate default apps to use roles.

Bug: 110557011
Test: manually tested the UI
Change-Id: I0ac340acd5a077c74b48b28c97f517adb2084a36
4 files changed