Do not update PointerIcon when stylus is not hovering

Updated maybeUpdatePointerIcon so that it only updates hover icon when
stylus is hovering.

Bug: 275851541
Test: manually tested
Change-Id: I08166f2fad3fe6da50bc142bc03223b99538780e

core/java/android/view/ViewRootImpl.java

@@ -6946,6 +6946,7 @@ public final class ViewRootImpl implements ViewParent,
                 return;
             }
             final boolean needsStylusPointerIcon = event.isStylusPointer()
+                    && event.isHoverEvent()
                     && mInputManager.isStylusPointerIconEnabled();
             if (needsStylusPointerIcon || event.isFromSource(InputDevice.SOURCE_MOUSE)) {
                 if (event.getActionMasked() == MotionEvent.ACTION_HOVER_ENTER