Use colorControlHighlight for print button ripple.

Instead of using #eeff41 (a random shade of yellow), use
the default color for ripples.

Change-Id: I32fc7e9a10a994deb2066941c96457ad8549dd11
Fixes: 30115080
diff --git a/packages/PrintSpooler/res/drawable/print_button.xml b/packages/PrintSpooler/res/drawable/print_button.xml
index b59afba..0114103 100644
--- a/packages/PrintSpooler/res/drawable/print_button.xml
+++ b/packages/PrintSpooler/res/drawable/print_button.xml
@@ -16,7 +16,7 @@
 -->
 
 <ripple xmlns:android="http://schemas.android.com/apk/res/android"
-    android:color="@color/print_button_tint_color">
+    android:color="?android:attr/colorControlHighlight">
     <item
         android:drawable="@drawable/print_button_background">
     </item>
diff --git a/packages/PrintSpooler/res/values/colors.xml b/packages/PrintSpooler/res/values/colors.xml
index 47e616e..9464c67 100644
--- a/packages/PrintSpooler/res/values/colors.xml
+++ b/packages/PrintSpooler/res/values/colors.xml
@@ -16,8 +16,6 @@
 
 <resources>
 
-    <color name="print_button_tint_color">#EEFF41</color>
-
     <color name="print_preview_scrim_color">#99000000</color>
 
     <color name="print_preview_background_color">#F2F1F2</color>