Additionally, hide all Dreams settings if the feature is
disabled (R.bool.config_enableDreams).
(Depends on change Idfe9d430)
Change-Id: Ifa05f125e411ca58605c33481de26cd29a926807
Depends on change Ied691856 for
Settings.Secure.DREAM_TIMEOUT and
Settings.Secure.DREAM_COMPONENT.
Change-Id: Ib6f74b74036e12637efb891b97e459a4e33444e7