Bug 1388554 - Adjust smart folder icon size to prevent icon cropped. r=maliu,nechen

The size of smart folder icon should be identical to favicon in TwoLinePageRow.
Also change scaleType from 'center' to 'centerInside' to prevent icon cropped.

MozReview-Commit-ID: 62vazt7EW4B

--HG--
extra : rebase_source : 3e2acfe3eea087a2a201dbf2bf47e6981380c7b8

mobile/android/app/src/photon/res/layout/home_smartfolder.xml

@@ -16,12 +16,12 @@
 
     <ImageView
         android:id="@+id/device_type"
-        android:layout_width="wrap_content"
-        android:layout_height="wrap_content"
+        android:layout_width="@dimen/favicon_small_size"
+        android:layout_height="@dimen/favicon_small_size"
         android:layout_margin="20dp"
-        android:scaleType="center"
+        android:scaleType="centerInside"
         android:layout_gravity="center_vertical"
-        tools:src="@drawable/cloud"/>
+        tools:src="@drawable/icon_recent"/>
 
     <LinearLayout
         android:layout_width="0dp"