Warn users when selecting non-Direct Boot apps.

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

src/com/android/settings/Utils.java

@@ -1150,5 +1150,14 @@ public final class Utils extends com.android.settingslib.Utils {
         }
         return false;
     }
-}
 
+    public static boolean isPackageDirectBootAware(Context context, String packageName) {
+        try {
+            final ApplicationInfo ai = context.getPackageManager().getApplicationInfo(
+                    packageName, 0);
+            return ai.isDirectBootAware() || ai.isPartiallyDirectBootAware();
+        } catch (NameNotFoundException ignored) {
+        }
+        return false;
+    }
+}