Re-enable 2246 on jit-on-first-use

The CL to disable intrinsic optimizations landed, so re-enabling 2246 on
jit-on-first-use config.

Bug: 259258187
Test: art/test.py -t 2246 --jit-on-first-use
Change-Id: I350a9e8d41fe08f3721185d927acd8407d381e16
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 14d72b9..7782cee 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -1570,10 +1570,5 @@
         "tests": ["2262-miranda-methods"],
         "variant": "jvm",
         "description": ["jvm doesn't seem to support calling miranda methods via CallNonVirtual."]
-    },
-    {
-        "tests": ["2246-trace-stream"],
-	"variant": "jit-on-first-use",
-        "description": ["Test failing due to lack of support for intrinsics."]
     }
 ]