Certain apps like Phone, SMS, Emergency Info, and IME are critical
enough that they ideally need to be runnable before the device is
unlocked after a reboot. Users can still pick non-Direct Boot aware
apps, but this change now warns users that the selected app won't be
runnable until after unlocking.
Bug: 27196876
Change-Id: I0498904d2f664fb41e8c1e6bb30d1cbf437cf4b9
Each default preference needs to have its corresponding
PreferenceAvailabilityProvider to provide us the availability of it.
If no corresponding provider is found, it is considered to be not
available. So it encourages other developers who will add new default app
preference later to consider the availability of it.
Bug:27143673
Change-Id: I073b7122dddc579504f397c5de2bdd4df3826269
