Update Android port

Update Android port

* java/org/gnu/emacs/EmacsActivity.java (attachWindow, onDestroy)
(onWindowFocusChanged, onContextMenuClosed):

* java/org/gnu/emacs/EmacsContextMenu.java (onMenuItemClick):

* java/org/gnu/emacs/EmacsDialog.java (onClick, display1, onDismiss):

* java/org/gnu/emacs/EmacsOpenActivity.java (checkReadableOrCopy)
(onDestroy, onWindowFocusChanged, onPause):

* java/org/gnu/emacs/EmacsWindowAttachmentManager.java
(registerWindow, removeWindowConsumer, detachWindow)
(noticeIconified, noticeDeiconified): Remove superfluous
debugging code now that the Android port is stable.

* java/org/gnu/emacs/EmacsView.java (onLayout): Detect if the
IME is hidden while a toplevel window is focused, and clear
isCurrentlyTextEditor in that case.
(onApplyWindowInsets): New function.
(raise, lower, popupMenu, onCreateInputConnection): Delete
aforementioned debugging code.