Misc logging changes

- log search result count, rank when clicking search result.
- log app package when default app is changed

Change-Id: Idd11bd67caba2beaa59c65839c40db8c71787388
Fix: 62072727
Test: make RunSettingsRoboTests

src/com/android/settings/search/SavedQueryViewHolder.java

@@ -20,6 +20,8 @@ package com.android.settings.search;
 import android.view.View;
 import android.widget.TextView;
 
+import com.android.internal.logging.nano.MetricsProto;
+
 public class SavedQueryViewHolder extends SearchViewHolder {
 
     public final TextView titleView;
@@ -31,6 +33,11 @@ public class SavedQueryViewHolder extends SearchViewHolder {
         removeButton = view.findViewById(android.R.id.icon);
     }
 
+    @Override
+    public int getClickActionMetricName() {
+        return MetricsProto.MetricsEvent.ACTION_CLICK_SETTINGS_SEARCH_SAVED_QUERY;
+    }
+
     @Override
     public void onBind(SearchFragment fragment, SearchResult result) {
         titleView.setText(result.title);