Update Android port

Update Android port

* java/org/gnu/emacs/EmacsView.java (EmacsView, dimensionsLock):
New field.
(<init>): Create new lock object.
(handleDirtyBitmap, onLayout, onAttachedToWindow): Make sure
measuredWidth and measuredHeight are extracted and set
atomically.  Send Expose upon layout changes if the view has
grown.