Adding avatar picker to platform allow list

Bug: b/306336441
Test: manual
Merged-In: I096d28bce5f879f88f185f09014d139f0497cb72
Change-Id: I096d28bce5f879f88f185f09014d139f0497cb72

data/etc/preinstalled-packages-platform.xml

@@ -128,4 +128,9 @@ to pre-existing users, but cannot uninstall pre-existing system packages from pr
     <install-in-user-type package="com.android.wallpaperbackup">
         <install-in user-type="FULL" />
     </install-in-user-type>
+
+    <!-- AvatarPicker (AvatarPicker app)-->
+    <install-in-user-type package="com.android.avatarpicker">
+        <install-in user-type="FULL" />
+    </install-in-user-type>
 </config>