[Thread] ignore all meshcop CTS tests before it's made stable

All the 3 meshcop_xxx CTS tests in ThreadNetworkControllerTest are
flaky:
1. meshcopService_threadEnabledButNotJoined_discoveredButNoNetwork fails
   if thread is disabled and then enabled
2. meshcopService_threadDisabled_notDiscovered fails if the discovery is
   not specifically on the test network
3. meshcopService_joinedNetwork_discoveredHasNetwork is already flaky

Bug: 332195449
Bug: 333649897
Bug: 396311014
Change-Id: Ibd3f7b05bddb6b28408f9411350e364dd720b335
diff --git a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
index 2d487ca..a979721 100644
--- a/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
+++ b/thread/tests/cts/src/android/net/thread/cts/ThreadNetworkControllerTest.java
@@ -1296,6 +1296,7 @@
     }
 
     @Test
+    @Ignore("b/333649897, b/332195449: The 3 meshcop tests are flaky in different environments")
     public void meshcopService_threadEnabledButNotJoined_discoveredButNoNetwork() throws Exception {
         setUpTestNetwork();
 
@@ -1348,6 +1349,7 @@
     }
 
     @Test
+    @Ignore("b/333649897, b/332195449: The 3 meshcop tests are flaky in different environments")
     public void meshcopService_threadDisabled_notDiscovered() throws Exception {
         setUpTestNetwork();
         CompletableFuture<NsdServiceInfo> serviceLostFuture = new CompletableFuture<>();