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/SearchFeatureProvider.java

@@ -19,8 +19,8 @@ package com.android.settings.search;
 import android.app.Activity;
 import android.content.Context;
 import android.view.Menu;
-
 import android.view.View;
+
 import com.android.settings.dashboard.SiteMapManager;
 
 import java.util.List;