Fix clipboard dismiss button text color in dark mode

Bug: 226170596
Fix: 226170596
Test: manual (turned talkback on, pressed "share" and then "copy"
on -1 page)

Change-Id: I7d0e4d958bea6042aef26b780729aeab88e08ce4

packages/SystemUI/res/layout/clipboard_overlay.xml

@@ -17,6 +17,7 @@
 <FrameLayout
     xmlns:android="http://schemas.android.com/apk/res/android"
     xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:theme="@style/FloatingOverlay"
     android:alpha="0"
     android:layout_width="match_parent"
     android:layout_height="match_parent">
@@ -28,7 +29,6 @@
         android:src="@drawable/overlay_actions_background_protection"/>
     <com.android.systemui.screenshot.DraggableConstraintLayout
         android:id="@+id/clipboard_ui"
-        android:theme="@style/FloatingOverlay"
         android:layout_width="match_parent"
         android:layout_height="match_parent">
         <ImageView