Add summary back to the homepage

Also update some summaries with new strings.

Bug: 183586663
Test: robotests & atest & visual

Change-Id: I692be9b34e8867501aaa8c8e40428870b99644f8

src/com/android/settings/display/TopLevelDisplayPreferenceController.java

@@ -17,11 +17,9 @@
 package com.android.settings.display;
 
 import android.content.Context;
-import android.util.FeatureFlagUtils;
 
 import com.android.settings.R;
 import com.android.settings.core.BasePreferenceController;
-import com.android.settings.core.FeatureFlags;
 
 public class TopLevelDisplayPreferenceController extends BasePreferenceController {
 
@@ -38,11 +36,6 @@ public class TopLevelDisplayPreferenceController extends BasePreferenceControlle
 
     @Override
     public CharSequence getSummary() {
-        // Remove homepage summaries for silky home.
-        if (FeatureFlagUtils.isEnabled(mContext, FeatureFlags.SILKY_HOME)) {
-            return null;
-        }
-
         final WallpaperPreferenceController controller =
                 new WallpaperPreferenceController(mContext, "unused_key");
         if (controller.isAvailable()) {