a2ddff3865
When 2g is disallowed by a device admin the 2g toggle in the preference screen will implement the following behaviors as a result of being changed to a RestrictedSwitchPreference: 1. become disabled (greyed out) 2. show a summary message explaining that the preference was disabled by an admin 3 show a pop up when a user tries to click on the preference informing them that the setting is unusable because it was disabled by an admin. Additionally, the toggle will show as unchecked (off) when admins disable 2g. When 2g is re-enabled by a device admin, the preference screen will go back to its previous state. Test: atest Enable2gPreferenceControllerTest Bug: b/248250240 Change-Id: I7af901f2d9f62ebfe884e01724d8eff845c2968e