[OverflowLinearLayout] Add filterTouchesWhenObscured=true to button layout.

PiperOrigin-RevId: 758795342

Author: leticiarossi

lib/java/com/google/android/material/overflow/res/layout/m3_overflow_button.xml

@@ -16,7 +16,8 @@
 -->
 <com.google.android.material.button.MaterialButton
   xmlns:android="http://schemas.android.com/apk/res/android"
+  style="?attr/overflowLinearLayoutOverflowButtonStyle"
   android:layout_width="wrap_content"
   android:layout_height="wrap_content"
   android:id="@+id/overflow_button"
-  style="?attr/overflowLinearLayoutOverflowButtonStyle"/>
+  android:filterTouchesWhenObscured="true"/>