Fix ToggleableGlobalSettingsFlag on user builds

TogglableFlags are not initalized if !IS_DEBUG_DEVICE. Thus,
trying to read from the ContentProvider produces a NPE.

Also make ENABLE_TASK_STABILIZER global again now that this
fix is in place.

Bug: 123429711
Change-Id: I252e9b3ef4e802e769865f13b14487a36b8e1f82
1 file changed