Search experience improvement for large screen

- Support fragment and direct link in SearchResultTrampoline
- Start activity for SI case and start deep link trampoline for others
- Disable menu highlight whenever the search bar is clicked
- Don't overwrite SettingsApplication's homepage activity in
  SliceDeepLinkHomepageActivity
- Scroll to highlighted menu entry after homepage is loaded to prevent
  UI overlapping

Bug: 201724410
Test: manual, robotest build pass
Change-Id: I5115d17d829e85036000da2e80f0e5b0598c733f

src/com/android/settings/homepage/SliceDeepLinkHomepageActivity.java

@@ -20,6 +20,11 @@ import android.content.ComponentName;
 
 /** Activity for Slices to launch Settings deep link page */
 public class SliceDeepLinkHomepageActivity extends SettingsHomepageActivity {
+    @Override
+    protected void setHomeActivity() {
+        // do not overwrite homepage activity in SettingsApplication
+    }
+
     @Override
     protected ComponentName getDeepLinkComponent() {
         return new ComponentName(getApplicationContext(), getClass());