Update dream settings UX to match latest mocks.

Updates:
- removed individual complication toggle
- added single toggle which enables/disables all supported complications
- updated colors to match mocks
- updated grid padding in order to line up with existing content. Note:
  this required more complex padding logic, using an item decorator to
  apply the padding only to inner grid elements.
- updated preview image, removing view nesting to make better use of
  ConstraintLayout
- Updated some strings to match mocks

Test: locally on device
Bug: 217555053
Change-Id: I573e5f4ed807cbe2ae9e00f183d402e6e3339590

src/com/android/settings/dream/DreamSettings.java

@@ -34,14 +34,12 @@ import androidx.recyclerview.widget.RecyclerView;
 import com.android.settings.R;
 import com.android.settings.dashboard.DashboardFragment;
 import com.android.settings.search.BaseSearchIndexProvider;
-import com.android.settings.widget.PreferenceCategoryController;
 import com.android.settingslib.core.AbstractPreferenceController;
 import com.android.settingslib.dream.DreamBackend;
 import com.android.settingslib.dream.DreamBackend.WhenToDream;
 import com.android.settingslib.search.SearchIndexable;
 
 import java.util.ArrayList;
-import java.util.Collections;
 import java.util.List;
 
 @SearchIndexable
@@ -52,7 +50,6 @@ public class DreamSettings extends DashboardFragment {
     static final String WHILE_DOCKED_ONLY = "while_docked_only";
     static final String EITHER_CHARGING_OR_DOCKED = "either_charging_or_docked";
     static final String NEVER_DREAM = "never";
-    private static final String COMPLICATIONS_CATEGORY_KEY = "dream_complication_category";
 
     @WhenToDream
     static int getSettingFromPrefKey(String key) {
@@ -138,14 +135,8 @@ public class DreamSettings extends DashboardFragment {
 
     private static List<AbstractPreferenceController> buildPreferenceControllers(Context context) {
         final List<AbstractPreferenceController> controllers = new ArrayList<>();
-        final DreamComplicationPickerController complicationPickerController =
-                new DreamComplicationPickerController(context);
-
-        controllers.add(complicationPickerController);
-        controllers.add(new WhenToDreamPreferenceController(context));
         controllers.add(new DreamPickerController(context));
-        controllers.add(new PreferenceCategoryController(context, COMPLICATIONS_CATEGORY_KEY)
-                .setChildren(Collections.singletonList(complicationPickerController)));
+        controllers.add(new WhenToDreamPreferenceController(context));
         return controllers;
     }