Include multiuser flag to launcher3 dependency

Bug: 360313403
Test: mp Launcherd / Static import of the android.multiuser.Flag method
Flag: EXEMPT adding dependency
Change-Id: I1a234ce61550c12d65c6e682285ec357fe91b82a
diff --git a/Android.bp b/Android.bp
index a4a058f..85632b2 100644
--- a/Android.bp
+++ b/Android.bp
@@ -25,6 +25,7 @@
     name: "launcher-non-platform-apis-defaults",
     static_libs: [
         "android.os.flags-aconfig-java",
+        "android.multiuser.flags-aconfig-java",
         "android.appwidget.flags-aconfig-java",
         "com.android.window.flags.window-aconfig-java",
     ],