Run bpf_existence_test in presubmit.

This has been green for a while. On S:

https://android-build.googleplex.com/builds/tests/view?invocationId=I42200010019333308&testResultId=TR79227903031586436

On R:
https://android-build.googleplex.com/builds/tests/view?invocationId=I28900010019347533&testResultId=TR73127903058200457

Test: treehugger
Change-Id: Iece7be238e069c7a71f150893a0f6cc155e7b09b
diff --git a/TEST_MAPPING b/TEST_MAPPING
index 302c0b3..20fecf4 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -19,6 +19,9 @@
       ]
     },
     {
+      "name": "bpf_existence_test"
+    },
+    {
       "name": "netd_updatable_unit_test"
     },
     {
@@ -40,9 +43,6 @@
     },
     // TODO: move to presubmit when known green.
     {
-      "name": "bpf_existence_test"
-    },
-    {
       "name": "netd_updatable_unit_test",
       "keywords": ["netd-device-kernel-4.9", "netd-device-kernel-4.14"]
     },
@@ -70,6 +70,9 @@
       ]
     },
     {
+      "name": "bpf_existence_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
+    },
+    {
       "name": "netd_updatable_unit_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
     },
     {
@@ -90,10 +93,6 @@
     },
     {
       "name": "TetheringCoverageTests[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
-    },
-    // TODO: move to mainline-presubmit when known green.
-    {
-      "name": "bpf_existence_test[CaptivePortalLoginGoogle.apk+NetworkStackGoogle.apk+com.google.android.resolv.apex+com.google.android.tethering.apex]"
     }
   ],
   "imports": [