android: Avoid big amount of space below the icons.

[between the icon and the text]

Change-Id: I7e4d7cfc7df5d186cc721f01ff2c8f157fcbc806

android/experimental/LOAndroid3/res/layout/file_explorer_grid_item.xml

@@ -14,7 +14,7 @@
     <ImageView
         android:id="@+id/grid_item_image"
         android:layout_width="100dp"
-        android:layout_height="142dp"
+        android:layout_height="100dp"
         android:scaleType="fitStart"
         android:layout_gravity="center">
     </ImageView>