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: I2d953f19e5d5eb5f5d8fdf4faf335d603bae42a0
diff --git a/TEST_MAPPING b/TEST_MAPPING
index fafd3bb..0f35a4d 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -5,6 +5,9 @@
       "options": [
         {
           "exclude-annotation": "com.android.testutils.NetworkStackModuleTest"
+        },
+        {
+          "exclude-annotation": "com.android.testutils.SkipPresubmit"
         }
       ]
     },