Fix text stroke issue in Android KitKat versions with text size greater than 256

There’s a bug in text stroking in KitKat versions of Android when
stroking text with a size greater than 256:
https://code.google.com/p/android/issues/detail?id=62800.  Implemented
the workaround mentioned in post #8 in the thread to draw the text to a
path rather than the draw text method directly.