Summary:
Discovered while testing D25584424, Sandy can't be applied and unapplied by regularly changing the setting.
This diff forces restart Flipper to correctly apply or unapply Sandy. This diff adds forced restart updated setting to check if restart is needed or not. Then, it disables regular `Apply` when restart is needed
Reviewed By: nikoant
Differential Revision: D25632887
fbshipit-source-id: 88b31fd740d4a639e20fe45a82e2615b53cad5c3