Bug 1042958 - Launcher icon for search activity. r=margaret

mobile/android/search/manifests/SearchAndroidManifest_activities.xml.in

@@ -1,5 +1,6 @@
         <activity
             android:name="org.mozilla.search.MainActivity"
+            android:icon="@drawable/search_launcher"
             android:label="@string/search_app_name"
             android:theme="@style/AppTheme"
             android:screenOrientation="portrait">
@@ -37,6 +38,7 @@
 
         <activity
             android:name="org.mozilla.search.SearchPreferenceActivity"
+            android:logo="@drawable/search_launcher"
             android:label="@string/search_pref_title"
             android:parentActivityName="org.mozilla.search.MainActivity"
             android:theme="@style/SettingsTheme" >