Update Android port

* java/org/gnu/emacs/EmacsService.java (displayToast):
* src/android.c (android_init_emacs_service): Remove unused
function.
* lisp/touch-screen.el (touch-screen-handle-point-up): Correctly
compute posn point.
(touch-screen-translate-touch): Update doc string.
(function-key-map): Define touch screen translation functions
within the internal border.

java/org/gnu/emacs/EmacsService.java

@@ -1086,26 +1086,6 @@ public final class EmacsService extends Service
 			temp, };
   }
 
-  /* Display the specified STRING in a small dialog box on the main
-     thread.  */
-
-  public void
-  displayToast (final String string)
-  {
-    runOnUiThread (new Runnable () {
-	@Override
-	public void
-	run ()
-	{
-	  Toast toast;
-
-	  toast = Toast.makeText (getApplicationContext (),
-				  string, Toast.LENGTH_SHORT);
-	  toast.show ();
-	}
-      });
-  }
-
   public void
   updateExtractedText (EmacsWindow window, ExtractedText text,
 		       int token)