Only show "hub mode" settings when the glanceable_hub_v2 flag is true.

Bug: 395320922
Test: atest CommunalPreferenceControllerTest
Flag: com.android.systemui.glanceable_hub_v2
Change-Id: I46e5931205a219806917fafcc1a7aac3b7046796
diff --git a/Android.bp b/Android.bp
index c966eca..ed094cf 100644
--- a/Android.bp
+++ b/Android.bp
@@ -115,6 +115,7 @@
         "device_policy_aconfig_flags_lib",
         "keyboard_flags_lib",
         "settings_connectivity_flags",
+        "com_android_systemui_flags_lib",
     ],
 
     plugins: [