OverviewActions: Adding action buttons to Oem quickstep.

Change-Id: Id5c0d8f1b41107535c1bac982b47f67eb2574c21
diff --git a/quickstep/res/values/styles.xml b/quickstep/res/values/styles.xml
index c8d7777..bf107fb 100644
--- a/quickstep/res/values/styles.xml
+++ b/quickstep/res/values/styles.xml
@@ -60,4 +60,13 @@
         parent="TextAppearance.BackGestureTutorial.ButtonLabel">
         <item name="android:textColor">@color/back_gesture_tutorial_primary_color</item>
     </style>
+
+    <style name="OverviewActionButton"
+        parent="@android:style/Widget.DeviceDefault.Button.Borderless">
+        <item name="android:textColor">?attr/workspaceTextColor</item>
+        <item name="android:drawableTint">?attr/workspaceTextColor</item>
+        <item name="android:tint">?attr/workspaceTextColor</item>
+        <item name="android:drawablePadding">4dp</item>
+        <item name="android:textAllCaps">false</item>
+    </style>
 </resources>
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