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/applications/defaultapps/DefaultAppPickerFragment.java

@@ -23,11 +23,11 @@ import android.app.DialogFragment;
 import android.app.Fragment;
 import android.content.Context;
 import android.content.DialogInterface;
-import android.content.DialogInterface.OnClickListener;
 import android.os.Bundle;
 import android.text.TextUtils;
+import android.util.Pair;
 
-import com.android.internal.logging.nano.MetricsProto;
+import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
 import com.android.settings.applications.PackageManagerWrapper;
 import com.android.settings.applications.PackageManagerWrapperImpl;
@@ -62,6 +62,16 @@ public abstract class DefaultAppPickerFragment extends RadioButtonPickerFragment
         }
     }
 
+    @Override
+    protected void onRadioButtonConfirmed(String selectedKey) {
+        mMetricsFeatureProvider.action(getContext(),
+                MetricsEvent.ACTION_SETTINGS_UPDATE_DEFAULT_APP,
+                selectedKey,
+                Pair.create(MetricsEvent.FIELD_CONTEXT, getMetricsCategory()));
+
+        super.onRadioButtonConfirmed(selectedKey);
+    }
+
     @Override
     public void bindPreferenceExtra(RadioButtonPreference pref,
             String key, CandidateInfo info, String defaultKey, String systemDefaultKey) {
@@ -97,7 +107,7 @@ public abstract class DefaultAppPickerFragment extends RadioButtonPickerFragment
 
         @Override
         public int getMetricsCategory() {
-            return MetricsProto.MetricsEvent.DEFAULT_APP_PICKER_CONFIRMATION_DIALOG;
+            return MetricsEvent.DEFAULT_APP_PICKER_CONFIRMATION_DIALOG;
         }
 
         /**