Promote CtsOsTestCases to presubmits am: b56bbc58a1

Original change: https://android-review.googlesource.com/c/platform/system/libhidl/+/3042235

Change-Id: I60e343282820b40d9910e8865adb525cb41c6cec
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>
diff --git a/TEST_MAPPING b/TEST_MAPPING
index a9ce2a2..7193d26 100644
--- a/TEST_MAPPING
+++ b/TEST_MAPPING
@@ -23,9 +23,7 @@
     },
     {
       "name": "hidl_test"
-    }
-  ],
-  "postsubmit": [
+    },
     {
        "name": "CtsOsTestCases",
        "options": [