Follow O patterns for a11y settings

Move the summary for the toggled features to a footer.
Make the settings appear as a preference.

Bug: 36780887
Test: Start settings and observe the new UI looks a lot
like the mocks referenced in the bug. Also added unit
test to verify that summary text shows up.

Change-Id: I1d002b194991d0901ecb27198ba5de73bd23a5a9

src/com/android/settings/accessibility/ToggleDaltonizerPreferenceFragment.java

@@ -49,6 +49,10 @@ public class ToggleDaltonizerPreferenceFragment extends ToggleFeaturePreferenceF
 
         mType = (ListPreference) findPreference("type");
 
+        if (!AccessibilitySettings.isColorTransformAccelerated(getActivity())) {
+            mFooterPreferenceMixin.createFooterPreference().setTitle(
+                    R.string.accessibility_display_daltonizer_preference_subtitle);
+        }
         initPreferences();
     }