Fix face icon size

Change-Id: I60a3c60ee91a69c7599e025a939932a0c0c1719e
Fixes: 117402444
Test: visual
diff --git a/packages/SystemUI/res/drawable/ic_face_unlock.xml b/packages/SystemUI/res/drawable/ic_face_unlock.xml
index 29c2275..b302ed4 100644
--- a/packages/SystemUI/res/drawable/ic_face_unlock.xml
+++ b/packages/SystemUI/res/drawable/ic_face_unlock.xml
@@ -15,8 +15,8 @@
   -->
 
 <vector xmlns:android="http://schemas.android.com/apk/res/android"
-        android:width="48dp"
-        android:height="48dp"
+        android:width="24dp"
+        android:height="24dp"
         android:viewportHeight="24.0"
         android:viewportWidth="24.0">
     <path android:fillColor="?attr/wallpaperTextColor"