Respect SkipPresubmit annotation for ConnectivityCoverageTests

Follow-up from aosp/2788197, the CL does not work since
SkipPresubmit annotation is not excluded from TEST_MAPPING for
ConnectivityCoverageTests.

Test: TH
Bug: 302325928
Change-Id: Ibfa509aadc9e54da14738714be46abd25f46f3fb

TEST_MAPPING

@@ -260,7 +260,12 @@
       "name": "netd_updatable_unit_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
     },
     {
-      "name": "ConnectivityCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+      "name": "ConnectivityCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]",
+      "options": [
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
+        }
+      ]
     },
     {
       "name": "traffic_controller_unit_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"