Skip cts testFirewallBlocking in instant mode.

Bug: 236662581
Test: aest  android.net.cts.ConnectivityManagerTest#testFirewallBlocking --instant
Change-Id: Ib8752439593dcd285146746b06b29f364e66ab85
(cherry picked from commit c4e6fcb6bc25630c5c8a67b425354028ae164644)
Merged-In: Ib8752439593dcd285146746b06b29f364e66ab85
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index c3e3aad..0e9c16d 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -3418,6 +3418,7 @@
     }
 
     @Test @IgnoreUpTo(SC_V2)
+    @AppModeFull(reason = "Socket cannot bind in instant app mode")
     public void testFirewallBlocking() {
         // Following tests affect the actual state of networking on the device after the test.
         // This might cause unexpected behaviour of the device. So, we skip them for now.