Trivially allow org.jcodings

Author: prdoyle

test/framework/src/main/java/org/elasticsearch/entitlement/runtime/policy/TestPolicyManager.java

@@ -149,6 +149,8 @@ private boolean isTestCode(Class<?> requestingClass) {
     private static final String[] TEST_FRAMEWORK_PACKAGE_PREFIXES = {
         "org.gradle",
 
+        "org.jcodings", // A library loaded with SPI that tries to create a CharsetProvider
+
         // We shouldn't really need the rest of these. They should be discovered on the testOnlyClasspath.
         "com.carrotsearch.randomizedtesting",
         "com.sun.tools.javac",