Update Android port

Update Android port

* java/org/gnu/emacs/EmacsActivity.java (EmacsActivity):
* java/org/gnu/emacs/EmacsApplication.java (findDumpFile):
* java/org/gnu/emacs/EmacsContextMenu.java (EmacsContextMenu)
(addSubmenu, display):
* java/org/gnu/emacs/EmacsDocumentsProvider.java
(getNotificationUri, queryChildDocuments, deleteDocument):
* java/org/gnu/emacs/EmacsDrawRectangle.java (perform):
* java/org/gnu/emacs/EmacsFillRectangle.java (perform):
* java/org/gnu/emacs/EmacsOpenActivity.java (readEmacsClientLog)
(checkReadableOrCopy):
* java/org/gnu/emacs/EmacsSdk7FontDriver.java
(EmacsSdk7FontDriver):
* java/org/gnu/emacs/EmacsSurfaceView.java (EmacsSurfaceView):
* java/org/gnu/emacs/EmacsView.java (EmacsView):
* java/org/gnu/emacs/EmacsWindow.java (EmacsWindow, onKeyUp):
* java/org/gnu/emacs/EmacsWindowAttachmentManager.java
(EmacsWindowAttachmentManager): Remove various unused arguments
and variables, dead stores, and make minor cleanups and
performance improvements.
* src/androidmenu.c (FIND_METHOD_STATIC, android_menu_show):
Adjust accordingly.