[AW Autofill] Not send view Exit/Enter if no position change.

To prevent unnecessary view Exit/Enter notification, we stopped
send them if the position wasn't change.

Bug: 1005545
Change-Id: I378a4ca0516ab636dc21eb72a1149613cabbe386
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1812238Reviewed-by: Changwan Ryu <changwan@chromium.org>
Commit-Queue: Tao Bai <michaelbai@chromium.org>
Cr-Commit-Position: refs/heads/master@{#699865}

android_webview/java/src/org/chromium/android_webview/AwAutofillProvider.java

@@ -331,10 +331,12 @@ public class AwAutofillProvider extends AutofillProvider {
             // the position could be changed.
             int virtualId = mRequest.getVirtualId(sIndex);
             Rect absBound = transformToWindowBounds(new RectF(x, y, x + width, y + height));
-            mAutofillManager.notifyVirtualViewExited(mContainerView, virtualId);
-            mAutofillManager.notifyVirtualViewEntered(mContainerView, virtualId, absBound);
-            // Update focus field position.
-            mRequest.setFocusField(new FocusField(focusField.fieldIndex, absBound));
+            if (!focusField.absBound.equals(absBound)) {
+                mAutofillManager.notifyVirtualViewExited(mContainerView, virtualId);
+                mAutofillManager.notifyVirtualViewEntered(mContainerView, virtualId, absBound);
+                // Update focus field position.
+                mRequest.setFocusField(new FocusField(focusField.fieldIndex, absBound));
+            }
         }
         notifyVirtualValueChanged(index);
         mAutofillUMA.onUserChangeFieldValue(mRequest.getField(sIndex).hasPreviouslyAutofilled());