Granted, ECM restricted settings should not be labeled as restricted

It is possible for an ECM restricted setting to also be granted. In this
case, the setting should be able to be toggled off, and the subheadings
should properly reflect the state.

Bug: 390196024
Test: atest RestrictedSwitchPreferenceTest
Flag: EXEMPT: minor bugfix
Change-Id: Ic2bd94bfafc1f7c39965a9818ba5484047e4d223