Use unified touch highlight in import & export

res/drawable/clickable_card.xml

@@ -2,7 +2,7 @@
 <selector xmlns:android="http://schemas.android.com/apk/res/android">
     <item android:state_pressed="true">
         <shape>
-            <solid android:color="@color/card_background_active" />
+            <solid android:color="@color/touch_highlight" />
         </shape>
         <bitmap android:src="@drawable/card" />
     </item>

res/values-v19/colors.xml

@@ -1,5 +1,4 @@
 <?xml version="1.0" encoding="utf-8"?>
 <resources>
     <color name="touch_highlight">#10000000</color>
-    <color name="card_background_active">#99bebebe</color>
 </resources>

res/values/colors.xml

@@ -12,7 +12,6 @@
     <color name="textsecure_holo_blue_light">#ff33b5e5</color>
 
     <color name="touch_highlight">#400099cc</color>
-    <color name="card_background_active">#9933b5e5</color>
 
     <color name="conversation_item_sent_background_dark">#ff284e0a</color>
     <color name="conversation_item_sent_background_light">#ff64a926</color>