OverviewActions - make button ripple workspace text color.

Uses a theme to set the control highlight color.

Test: local on dark and light wallpaper
Change-Id: Iddb668fcbd3ab760faabd9c296274315d63e044f
diff --git a/quickstep/res/layout/overview_actions_container.xml b/quickstep/res/layout/overview_actions_container.xml
index e163991..1ecec25 100644
--- a/quickstep/res/layout/overview_actions_container.xml
+++ b/quickstep/res/layout/overview_actions_container.xml
@@ -35,6 +35,7 @@
         </Space>
         <Button
             android:id="@+id/action_screenshot"
+            android:theme="@style/ThemeControlHighlightWorkspaceColor"
             style="@style/OverviewActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
@@ -48,6 +49,7 @@
 
         <Button
             android:id="@+id/action_share"
+            android:theme="@style/ThemeControlHighlightWorkspaceColor"
             style="@style/OverviewActionButton"
             android:layout_width="wrap_content"
             android:layout_height="wrap_content"
diff --git a/quickstep/res/values/styles.xml b/quickstep/res/values/styles.xml
index 3926988..c97ee7c 100644
--- a/quickstep/res/values/styles.xml
+++ b/quickstep/res/values/styles.xml
@@ -69,6 +69,14 @@
         <item name="android:textColor">@color/gesture_tutorial_primary_color</item>
     </style>
 
+    <!--
+      Can be applied to views to color things like ripples and list highlights the workspace text
+      color.
+    -->
+    <style name="ThemeControlHighlightWorkspaceColor">
+        <item name="android:colorControlHighlight">?attr/workspaceTextColor</item>
+    </style>
+
     <style name="OverviewActionButton"
         parent="@android:style/Widget.DeviceDefault.Button.Borderless">
         <item name="android:textColor">?attr/workspaceTextColor</item>