Use ConnectivityCheckTargetPreparer in tethering cts

This can make sure test device have wifi and mobile data connectivity before running tethering test.

Bug: 264785877
Change-Id: Iac416ca4aaccf3936134aa878b49160ca07f0486
Test: TH
diff --git a/tests/cts/tethering/Android.bp b/tests/cts/tethering/Android.bp
index 42949a4..4284f56 100644
--- a/tests/cts/tethering/Android.bp
+++ b/tests/cts/tethering/Android.bp
@@ -46,6 +46,7 @@
 
     // Change to system current when TetheringManager move to bootclass path.
     platform_apis: true,
+    host_required: ["net-tests-utils-host-common"],
 }
 
 // Tethering CTS tests that target the latest released SDK. These tests can be installed on release