Change opacity of dragged state in cards

PiperOrigin-RevId: 234603183

Author: ymarian

lib/java/com/google/android/material/card/res/color/mtrl_card_view_foreground.xml

@@ -18,6 +18,6 @@
 <selector xmlns:android="http://schemas.android.com/apk/res/android"
   xmlns:app="http://schemas.android.com/apk/res-auto">
   <item android:alpha="0.08" android:color="?attr/colorPrimary" android:state_checked="true"/>
-  <item android:alpha="0.20" android:color="?attr/colorOnSurface" app:state_dragged="true"/>
+  <item android:alpha="0.08" android:color="?attr/colorOnSurface" app:state_dragged="true"/>
   <item android:color="@android:color/transparent" android:state_checked="false" app:state_dragged="false"/>
 </selector>