Update current SDK prebuilts to build #1863886

Change-Id: I7e3039497d6015da0042b8c33d3b9fd50acb7f2b
diff --git a/current/support/design/res/values/attrs.xml b/current/support/design/res/values/attrs.xml
index c018923..e155e23 100644
--- a/current/support/design/res/values/attrs.xml
+++ b/current/support/design/res/values/attrs.xml
@@ -160,6 +160,11 @@
         <attr name="maxActionInlineWidth" format="dimension"/>
     </declare-styleable>
 
+    <declare-styleable name="AppBarLayout">
+        <attr name="elevation" />
+        <attr name="android:background" />
+    </declare-styleable>
+
     <declare-styleable name="AppBarLayout_LayoutParams">
         <attr name="layout_scrollFlags">
             <!-- The view will be scroll in direct relation to scroll events. This flag needs to be