Aperture: Fix photo -> video shutter button color transition

Change-Id: I9ceb6d9713f6db7c56415801469fdc705d8711d6
diff --git a/app/src/main/res/animator/photo_video_color.xml b/app/src/main/res/animator/photo_video_color.xml
index 0809277..c1ee2da 100644
--- a/app/src/main/res/animator/photo_video_color.xml
+++ b/app/src/main/res/animator/photo_video_color.xml
@@ -7,6 +7,6 @@
     <objectAnimator
         android:duration="300"
         android:propertyName="fillColor"
-        android:valueFrom="@color/gray_60"
+        android:valueFrom="?attr/colorSecondaryContainer"
         android:valueTo="@android:color/white" />
 </set>