Bug 1988703 - Deny button should be seen in site permissions prompt. r=android-reviewers,tthibaud

Differential Revision: https://phabricator.services.mozilla.com/D265940

Author: iorgamgabriel

mobile/android/android-components/components/feature/sitepermissions/src/main/res/layout/mozac_site_permissions_prompt.xml

@@ -100,7 +100,7 @@
 
     <Button
         android:id="@+id/deny_button"
-        style="?android:attr/borderlessButtonStyle"
+        style="?attr/materialButtonOutlinedStyle"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_below="@id/do_not_ask_again"