Add missing section in android.adoc (#103)

src/docs/asciidoc/jme3/advanced/android.adoc

@@ -51,7 +51,7 @@ drawable-xhdpi (should contain the icon named the same at 96×96 pixels)\\
 
 . Add the image to the `mobile\res\drawable` directory.
 
-Compiling Google Play Services and Adding it to Your Project:
+== Compiling Google Play Services and Adding it to Your Project:
 
 First get the api: