Add some non-connectivity-module-test back to ConnectivityCoverageTests

In S, the tests are listed in the non-connectivity-module-test
where their testing files are not in the connectivity module.
But some files move into the connectivity module in T. So some
tests can be removed from non-connectivity-module-test and will
be running on ConnectivityCoverageTests to count their code
coverage.

Also update some tests to make them compatible with
mockito-extended and ignore some tests which need to test with
T apis.

Bug: 234000451
Test: atest FrameworksNetTests ConnectivityCoverageTests
Change-Id: I47fb59334d00ae7fee91c5694548b3cf89b09b2d
diff --git a/tests/unit/java/android/net/IpSecManagerTest.java b/tests/unit/java/android/net/IpSecManagerTest.java
index cda8eb7..335f539 100644
--- a/tests/unit/java/android/net/IpSecManagerTest.java
+++ b/tests/unit/java/android/net/IpSecManagerTest.java
@@ -52,7 +52,7 @@
 /** Unit tests for {@link IpSecManager}. */
 @SmallTest
 @RunWith(DevSdkIgnoreRunner.class)
-@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.R)
+@DevSdkIgnoreRule.IgnoreUpTo(Build.VERSION_CODES.S_V2)
 public class IpSecManagerTest {
 
     private static final int TEST_UDP_ENCAP_PORT = 34567;