Bug 742478 - Integrate appropriate icons for for sending tabs. r=assets-only

mobile/android/base/resources/values/sync_styles.xml

@@ -96,7 +96,7 @@
     <item name="android:text">@string/sync_pin_default</item>
   </style>
   <style name="SyncTopIcon">
-    <item name="android:src">@drawable/sync_ic_launcher</item>
+    <item name="android:src">@drawable/sync_fx_icon</item>
     <item name="android:layout_width">wrap_content</item>
     <item name="android:layout_height">wrap_content</item>
     <item name="android:paddingTop">2dp</item>

mobile/android/sync/android-drawable-hdpi-resources.mn

@@ -1 +1,2 @@
+mobile/android/base/resources/drawable-hdpi/sync_fx_icon.png
 mobile/android/base/resources/drawable-hdpi/sync_ic_launcher.png

mobile/android/sync/android-drawable-ldpi-resources.mn

@@ -1 +1,2 @@
+mobile/android/base/resources/drawable-ldpi/sync_fx_icon.png
 mobile/android/base/resources/drawable-ldpi/sync_ic_launcher.png

mobile/android/sync/android-drawable-mdpi-resources.mn

@@ -1 +1,2 @@
+mobile/android/base/resources/drawable-mdpi/sync_fx_icon.png
 mobile/android/base/resources/drawable-mdpi/sync_ic_launcher.png