Android: Add missing 'L' prefix and ';' postfix in areaToRect()

While it works just fine without the post-/prefix, they are suppose
to be there...

Change-Id: I99365d37c70c65ccf0713d6b2d8330030b265e8e
Reviewed-by: Yoann Lopes <yoann.lopes@digia.com>