Return null if getStackAccessControlContext is done during JDK initialization

Author: lazar-mitrovic

substratevm/src/com.oracle.svm.core/src/com/oracle/svm/core/jdk/SecuritySubstitutions.java

@@ -118,9 +118,7 @@ static AccessControlContext getStackAccessControlContext() {
              * PrintWriter/Logging is available yet. This manifested when
              * UseDedicatedVMOperationThread hosted option was set, triggering a runtime crash.
              */
-            Permissions perms = new Permissions();
-            perms.add(SecurityConstants.ALL_PERMISSION);
-            return new AccessControlContext(new ProtectionDomain[]{new ProtectionDomain(null, perms)});
+            return null;
         }
         return StackAccessControlContextVisitor.getFromStack();
     }