Update Android port

Update Android port

* java/Makefile.in (ETAGS, clean): New rules to generate tags.
* java/org/gnu/emacs/EmacsActivity.java (EmacsActivity):
* java/org/gnu/emacs/EmacsApplication.java (EmacsApplication):
* java/org/gnu/emacs/EmacsContextMenu.java (EmacsContextMenu):
* java/org/gnu/emacs/EmacsCopyArea.java (EmacsCopyArea):
* java/org/gnu/emacs/EmacsDialog.java (EmacsDialog)::(dialog.
Then):
* java/org/gnu/emacs/EmacsDocumentsProvider.java
(EmacsDocumentsProvider):
* java/org/gnu/emacs/EmacsDrawLine.java (EmacsDrawLine):
* java/org/gnu/emacs/EmacsDrawPoint.java (EmacsDrawPoint):
* java/org/gnu/emacs/EmacsDrawRectangle.java
(EmacsDrawRectangle):
* java/org/gnu/emacs/EmacsFillPolygon.java (EmacsFillPolygon):
* java/org/gnu/emacs/EmacsFillRectangle.java
(EmacsFillRectangle):
* java/org/gnu/emacs/EmacsGC.java (EmacsGC):
* java/org/gnu/emacs/EmacsInputConnection.java
(EmacsInputConnection):
* java/org/gnu/emacs/EmacsNative.java (EmacsNative):
* java/org/gnu/emacs/EmacsNoninteractive.java
(EmacsNoninteractive):
* java/org/gnu/emacs/EmacsOpenActivity.java (EmacsOpenActivity):
* java/org/gnu/emacs/EmacsPixmap.java (EmacsPixmap):
* java/org/gnu/emacs/EmacsPreferencesActivity.java
(EmacsPreferencesActivity):
* java/org/gnu/emacs/EmacsSdk11Clipboard.java
(EmacsSdk11Clipboard):
* java/org/gnu/emacs/EmacsSdk23FontDriver.java
(EmacsSdk23FontDriver):
* java/org/gnu/emacs/EmacsSdk8Clipboard.java
(EmacsSdk8Clipboard):
* java/org/gnu/emacs/EmacsService.java (EmacsService):
* java/org/gnu/emacs/EmacsSurfaceView.java (EmacsSurfaceView)
(buffers):
* java/org/gnu/emacs/EmacsView.java (EmacsView, ViewGroup):
* java/org/gnu/emacs/EmacsWindow.java (EmacsWindow, drawables):
* java/org/gnu/emacs/EmacsWindowAttachmentManager.java
(EmacsWindowAttachmentManager): Make classes final where
appropriate.