Re-enable HostsideVpnTests on presubmit

Some tests were disabled by aosp/2676836 since these tests were flaky
(b/291701394).
b/291701394 was fixed. So, this CL re-enables them on presubmit.

Bug: 291701394
Bug: 342557183
Test: VpnTest --iterations 10
Change-Id: I299dd0dfd7d6cbdea2ad97477b5613c78af421e1
diff --git a/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java b/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
index f0a87af..cea60f9 100644
--- a/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
+++ b/tests/cts/hostside/src/com/android/cts/net/HostsideVpnTests.java
@@ -18,8 +18,6 @@
 
 import android.platform.test.annotations.RequiresDevice;
 
-import com.android.testutils.SkipPresubmit;
-
 import org.junit.After;
 import org.junit.Before;
 import org.junit.Test;
@@ -37,13 +35,11 @@
         uninstallPackage(TEST_APP2_PKG, true);
     }
 
-    @SkipPresubmit(reason = "Out of SLO flakiness")
     @Test
     public void testChangeUnderlyingNetworks() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testChangeUnderlyingNetworks");
     }
 
-    @SkipPresubmit(reason = "Out of SLO flakiness")
     @Test
     public void testDefault() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testDefault");
@@ -166,7 +162,6 @@
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testBlockIncomingPackets");
     }
 
-    @SkipPresubmit(reason = "Out of SLO flakiness")
     @Test
     public void testSetVpnDefaultForUids() throws Exception {
         runDeviceTests(TEST_PKG, TEST_PKG + ".VpnTest", "testSetVpnDefaultForUids");