Use the AOSP color for the captive portal app background
am: 0b6602771f

Change-Id: I94a4b24d27e74f9bd50ca8b65cfd8f3ada3cd1fb
diff --git a/res/drawable/app_icon.xml b/res/drawable/app_icon.xml
index 456ca83..4571b62 100644
--- a/res/drawable/app_icon.xml
+++ b/res/drawable/app_icon.xml
@@ -15,7 +15,7 @@
 -->
 <adaptive-icon xmlns:android="http://schemas.android.com/apk/res/android">
     <background>
-        <color android:color="@*android:color/accent_device_default_light" />
+        <color android:color="#008577" />
     </background>
     <foreground>
         <inset