Add android:configChanges for SettingsHomepageActivity

When resuming Settings app of large screen devices,
SettingsHomepageActivity will be re-created for
Activity resized. It produces unnecessary Activity
destroy and re-create.

This change prevents SettingsHomepageActivity from
configuration changes for screenSize|screenLayout.

Bug: 198361315
Test: manual
      1. Launch Settings app by a Settings shortcut widget.
      2. Move Settings app to background.
      3. Click Settings shortcut widget again.
         Observe if SettingsHomepageActivity re-creates.
Change-Id: I4d71330f6a1760768ba4443e192f66b0a2cbb6bf

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

@@ -208,6 +208,9 @@ public class SettingsHomepageActivity extends FragmentActivity implements
             return;
         }
 
+        // To prevent launchDeepLinkIntentToRight again for configuration change.
+        intent.setAction(null);
+
         targetIntent.setFlags(targetIntent.getFlags() & ~Intent.FLAG_ACTIVITY_NEW_TASK);
 
         targetIntent.putExtra(EXTRA_IS_FROM_SETTINGS_HOMEPAGE, true);