Revert "Blacklist test failing on debuggable."

This reverts commit 4b7183e61bb5efb4d6a694ef4ed682fd6801b5f6.

Reason for revert: Test also fails on target - reverting original change instead.

Bug: 149168708
Change-Id: I4cc44f1d7b4eafe47e4866e059964eaac410b829
diff --git a/test/knownfailures.json b/test/knownfailures.json
index 630c58a..d4d279c 100644
--- a/test/knownfailures.json
+++ b/test/knownfailures.json
@@ -308,12 +308,6 @@
         "variant": "interp-ac"
     },
     {
-        "tests": "596-app-images",
-        "description": "Fails on debuggable",
-        "bug" : "b/149168708",
-        "variant": "debuggable"
-    },
-    {
         "tests": "597-app-images-same-classloader",
         "description": "not generated when using the access check configuration",
         "variant": "interp-ac"