Revise homepage highlight mechanism

- Create TopLevelHighlightMixin to handle highlight actions and simplify
  TopLevelSettings
- Fix the error highlight and the flicker after screen rotation
- Postpone creating the fragment until it's needed to accelerate the
  initialization and to fix the search highlight function breakage after
  toggling light/dark mode
- Register activity embedding rules only once for injection and
  wallpaper
- Do not highlight Tips & support since it's full screen
- Refactor ActivityEmbeddingRulesController

Bug: 207316936
Test: manual, robotest build pass
Change-Id: If322ec180b03ee123987c70779a25c6a570d9faf

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

@@ -63,6 +63,11 @@ public class TopLevelWallpaperPreferenceController extends BasePreferenceControl
         super.displayPreference(screen);
         Preference preference = screen.findPreference(getPreferenceKey());
         preference.setTitle(getTitle());
+        ActivityEmbeddingRulesController.registerTwoPanePairRuleForSettingsHome(
+                mContext,
+                getComponentName(),
+                null /* secondaryIntentAction */,
+                true /* clearTop */);
     }
 
     public String getTitle() {
@@ -103,11 +108,6 @@ public class TopLevelWallpaperPreferenceController extends BasePreferenceControl
                     mContext)) {
                 intent.setFlags(Intent.FLAG_ACTIVITY_NEW_TASK | Intent.FLAG_ACTIVITY_CLEAR_TASK);
             }
-            ActivityEmbeddingRulesController.registerTwoPanePairRuleForSettingsHome(
-                    mContext,
-                    intent.getComponent(),
-                    null /* secondaryIntentAction */,
-                    true /* clearTop */);
             preference.getContext().startActivity(intent);
             return true;
         }