Diable ConnectivityManagerTest#testFactoryReset

The testFactoryReset has around 1% flaky. Temporarily disable
it till flaky is fixed, which is blocked by b/254183718.

Bug: 277856014
Test: atest ConnectivityManagerTest
Change-Id: I2a2156957e9aa05fc9c12133cad4d7dd63f4e425
diff --git a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
index 1411a37..03e74e0 100644
--- a/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
+++ b/tests/cts/net/src/android/net/cts/ConnectivityManagerTest.java
@@ -2560,9 +2560,10 @@
         assertThrows(SecurityException.class, () -> mCm.factoryReset());
     }
 
-    @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
-    @Test
-    public void testFactoryReset() throws Exception {
+    // @AppModeFull(reason = "Cannot get WifiManager in instant app mode")
+    // @Test
+    // Temporarily disable the unreliable test, which is blocked by b/254183718.
+    private void testFactoryReset() throws Exception {
         assumeTrue(TestUtils.shouldTestSApis());
 
         // Store current settings.