Add connectivity pre-check for CtsHostsideNetworkTests

Test: atest CtsHostsideNetworkTests
Flag: TEST_ONLY
Change-Id: If7f8cd614f0528248ca87be1d3aac5396b64e071

tests/cts/hostside/Android.bp

@@ -47,6 +47,7 @@ java_test_host {
     ],
     static_libs: [
         "modules-utils-build-testing",
+        "net-tests-utils-host-common",
     ],
     // Tag this module as a cts test artifact
     test_suites: [

tests/cts/hostside/AndroidTest.xml

@@ -25,6 +25,7 @@
     <option name="config-descriptor:metadata" key="mainline-param" value="com.google.android.tethering.apex" />
 
     <target_preparer class="com.android.compatibility.common.tradefed.targetprep.LocationCheck" />
+    <target_preparer class="com.android.testutils.ConnectivityTestTargetPreparer" />
 
     <!-- Enabling change id ALLOW_TEST_API_ACCESS allows that package to access @TestApi methods -->
     <target_preparer class="com.android.tradefed.targetprep.RunCommandTargetPreparer">