Disable test broken by infra changes.

Bug: http://b/178980410
Test: none
Change-Id: I5b56a053bf0aa31bbdca6ca0d84d9cb45818a3a9
diff --git a/test_adb.py b/test_adb.py
index a32d875..64278dc 100755
--- a/test_adb.py
+++ b/test_adb.py
@@ -286,9 +286,11 @@
         os.name == "posix",
         "adb doesn't yet support IPv6 on Windows",
     )
-    def test_starts_on_ipv6_localhost(self):
+    def disabled_test_starts_on_ipv6_localhost(self):
         """
         Tests that the server can start up on ::1 and that it's accessible
+
+        Disabled due to b/178980410
         """
 
         server_port = find_open_port()