Add reflection config for ICU4J encodings we use

Author: msimacek

graalpython/com.oracle.graal.python/src/META-INF/native-image/org.graalvm.python/python-language/reflect-config.json

@@ -26,6 +26,45 @@
       }
     ]
   },
+  {
+    "name": "org.graalvm.shadowed.com.ibm.icu.charset.CharsetHZ",
+    "methods": [
+      {
+        "name": "<init>",
+        "parameterTypes": [
+          "java.lang.String",
+          "java.lang.String",
+          "java.lang.String[]"
+        ]
+      }
+    ]
+  },
+  {
+    "name": "org.graalvm.shadowed.com.ibm.icu.charset.CharsetMBCS",
+    "methods": [
+      {
+        "name": "<init>",
+        "parameterTypes": [
+          "java.lang.String",
+          "java.lang.String",
+          "java.lang.String[]"
+        ]
+      }
+    ]
+  },
+  {
+    "name": "org.graalvm.shadowed.com.ibm.icu.charset.CharsetUTF7",
+    "methods": [
+      {
+        "name": "<init>",
+        "parameterTypes": [
+          "java.lang.String",
+          "java.lang.String",
+          "java.lang.String[]"
+        ]
+      }
+    ]
+  },
   {
     "name": "com.sun.crypto.provider.AESCipher$General",
     "methods": [