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/EmacsActivity.java

@@ -179,6 +179,8 @@ public class EmacsActivity extends Activity
   public final void
   attachWindow (EmacsWindow child)
   {
+    FrameLayout.LayoutParams defaultParams;
+
     if (window != null)
       throw new IllegalStateException ("trying to attach window when one"
 				       + " already exists");
@@ -187,8 +189,15 @@ public class EmacsActivity extends Activity
 
     /* Record and attach the view.  */
 
+    /* Reset residual LayoutParams that might remain in effect on this
+       window, or some distributions of Android (e.g. Huawei HarmonyOS
+       4.2) will retain the size of this window as a child frame.  */
+    defaultParams
+      = new FrameLayout.LayoutParams (FrameLayout.LayoutParams.MATCH_PARENT,
+				      FrameLayout.LayoutParams.MATCH_PARENT);
+    syncFullscreenWith (child);
     window = child;
-    layout.addView (window.view);
+    layout.addView (window.view, defaultParams);
     child.setConsumer (this);
 
     /* If the window isn't no-focus-on-map, focus its view.  */