[Expressive design] IntroPreference should not be round corner

Bug: 377266201
Test: visual test
Flag: EXEMPT update library
Change-Id: I62aae4228be42391a0d22a22b5e39dc82a8ade29
diff --git a/packages/SettingsLib/IntroPreference/src/com/android/settingslib/widget/IntroPreference.kt b/packages/SettingsLib/IntroPreference/src/com/android/settingslib/widget/IntroPreference.kt
index 0cdfc66..8133761 100644
--- a/packages/SettingsLib/IntroPreference/src/com/android/settingslib/widget/IntroPreference.kt
+++ b/packages/SettingsLib/IntroPreference/src/com/android/settingslib/widget/IntroPreference.kt
@@ -31,7 +31,7 @@
     attrs: AttributeSet? = null,
     defStyleAttr: Int = 0,
     defStyleRes: Int = 0
-) : Preference(context, attrs, defStyleAttr, defStyleRes) {
+) : Preference(context, attrs, defStyleAttr, defStyleRes), GroupSectionDividerMixin {
 
     private var isCollapsable: Boolean = false
     private var minLines: Int = 2