pt 1 in reviving the android build (copied from pm 28a1, wish me luck)

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/utils/JdkIdn.java

@@ -0,0 +1,71 @@
+/*
+ * ====================================================================
+ * Licensed to the Apache Software Foundation (ASF) under one
+ * or more contributor license agreements.  See the NOTICE file
+ * distributed with this work for additional information
+ * regarding copyright ownership.  The ASF licenses this file
+ * to you under the Apache License, Version 2.0 (the
+ * "License"); you may not use this file except in compliance
+ * with the License.  You may obtain a copy of the License at
+ *
+ *   http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing,
+ * software distributed under the License is distributed on an
+ * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
+ * KIND, either express or implied.  See the License for the
+ * specific language governing permissions and limitations
+ * under the License.
+ * ====================================================================
+ *
+ * This software consists of voluntary contributions made by many
+ * individuals on behalf of the Apache Software Foundation.  For more
+ * information on the Apache Software Foundation, please see
+ * <http://www.apache.org/>.
+ *
+ */
+package ch.boye.httpclientandroidlib.client.utils;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+
+import ch.boye.httpclientandroidlib.annotation.Immutable;
+
+/**
+ * Uses the java.net.IDN class through reflection.
+ *
+ * @since 4.0
+ */
+@Immutable
+public class JdkIdn implements Idn {
+    private final Method toUnicode;
+
+    /**
+     *
+     * @throws ClassNotFoundException if java.net.IDN is not available
+     */
+    public JdkIdn() throws ClassNotFoundException {
+        final Class<?> clazz = Class.forName("java.net.IDN");
+        try {
+            toUnicode = clazz.getMethod("toUnicode", String.class);
+        } catch (final SecurityException e) {
+            // doesn't happen
+            throw new IllegalStateException(e.getMessage(), e);
+        } catch (final NoSuchMethodException e) {
+            // doesn't happen
+            throw new IllegalStateException(e.getMessage(), e);
+        }
+    }
+
+    public String toUnicode(final String punycode) {
+        try {
+            return (String) toUnicode.invoke(null, punycode);
+        } catch (final IllegalAccessException e) {
+            throw new IllegalStateException(e.getMessage(), e);
+        } catch (final InvocationTargetException e) {
+            final Throwable t = e.getCause();
+            throw new RuntimeException(t.getMessage(), t);
+        }
+    }
+
+}