[a11y][Chips] Add missing 'button' mention to Talkback output for close icon.

Recording, before:  http://recall/-/hPu3uxWupaB3jE5JXfMuKd/cAF19QKQl7DNPiEUSh5nHq
Recording, after:  http://recall/-/hPu3uxWupaB3jE5JXfMuKd/crZJ8t5wC4xppg19MTmHDE

PiperOrigin-RevId: 726017137

Author: kendrickumstattd

lib/java/com/google/android/material/chip/Chip.java

@@ -54,6 +54,7 @@
 import android.view.ViewParent;
 import android.view.accessibility.AccessibilityEvent;
 import android.view.accessibility.AccessibilityNodeInfo;
+import android.widget.Button;
 import android.widget.CompoundButton;
 import androidx.annotation.AnimatorRes;
 import androidx.annotation.BoolRes;
@@ -1010,6 +1011,8 @@ protected void onPopulateNodeForVirtualView(
         node.setBoundsInParent(getCloseIconTouchBoundsInt());
         node.addAction(AccessibilityActionCompat.ACTION_CLICK);
         node.setEnabled(isEnabled());
+        // Set the class name to Button so that the close icon is treated as a button by TalkBack.
+        node.setClassName(Button.class.getName());
       } else {
         node.setContentDescription("");
         node.setBoundsInParent(EMPTY_BOUNDS);