Fix remaining Android bugs reported over the past months

* java/org/gnu/emacs/EmacsActivity.java (attachWindow):
Guarantee that child windows promoted to toplevels receive
layout parameters that direct them to receive their parents'
dimensions.  Otherwise, the size of the window as a child is
retained on Huawei HarmonyOS 4.2 and possibly other Android
distributions.

* java/org/gnu/emacs/EmacsService.java (updateCursorAnchorInfo):
Run anchor updates on the UI thread, as
`InputMethodManager#updateCursorAnchorInfo' is liable to call
`View#requestLayout'.

* java/org/gnu/emacs/EmacsView.java (onMeasure): Always call
`measureChildren', or child frames' onLayout handlers might not
be invoked after they request a layout cycle and are duly
processed in `onLayout'.
(swapBuffers): Delete erroneous commentary.

* java/org/gnu/emacs/EmacsWindow.java (viewLayout): If
overrideRedirect, don't inadvertently clear rect.left and
rect.top by recording the window's WM window-relative position.
Fix typos.
(reparentTo): Invalidate focus after transferring frame.
(translateCoordinates): Account for override-redirect windows.
Mostly important for mouse-drag-and-drop-region.

java/org/gnu/emacs/EmacsView.java

@@ -296,6 +296,9 @@ public final class EmacsView extends ViewGroup
 	     && height > MeasureSpec.getSize (heightMeasureSpec))
       height = MeasureSpec.getSize (heightMeasureSpec);
 
+    /* This is strictly necessary to propagate layout requests to
+       children.  */
+    this.measureChildren (widthMeasureSpec, heightMeasureSpec);
     super.setMeasuredDimension (width, height);
   }
 
@@ -467,9 +470,6 @@ public final class EmacsView extends ViewGroup
       }
   }
 
-  /* This method is called from both the UI thread and the Emacs
-     thread.  */
-
   public void
   swapBuffers ()
   {
@@ -620,8 +620,7 @@ public final class EmacsView extends ViewGroup
 	detachViewFromParent (index);
 
 	/* The view at 0 is the surface view.  */
-	attachViewToParent (child, 1,
-			    child.getLayoutParams ());
+	attachViewToParent (child, 1, child.getLayoutParams ());
       }
   }