Zhen Zhang 43b882c4e2 Let MasterSwitchPreference be restrictable
Let MasterSwitchPreference be restrictable by extending RestrictedPreference.
This is a prerequisite CL for "Hotspot & Tethering" in "Network & Internet" settings screen to be a MasterSwtichPreference.
Also changed MasterSwitchPreferenceTest perse.

Bug: 145922022
Test: SettingsRoboTests except StorageItemPreferenceControllerTest which
fails before this CL.
Change-Id: I54fa59d7adfce5f564c178c0db334974dbabf059
2019-12-10 17:37:41 -08:00
2019-03-27 07:14:20 +08:00
2019-04-04 12:49:15 -07:00
2019-11-25 20:28:35 +09:00
2019-11-25 20:28:35 +09:00
2019-07-12 16:35:12 +08:00
2019-02-06 15:44:40 +00:00
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