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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/UserTokenHandler.java

@@ -0,0 +1,58 @@
+/*
+ * ====================================================================
+ * 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;
+
+import ch.boye.httpclientandroidlib.protocol.HttpContext;
+
+/**
+ * A handler for determining if the given execution context is user specific
+ * or not. The token object returned by this handler is expected to uniquely
+ * identify the current user if the context is user specific or to be
+ * <code>null</code> if the context does not contain any resources or details
+ * specific to the current user.
+ * <p/>
+ * The user token will be used to ensure that user specific resources will not
+ * be shared with or reused by other users.
+ *
+ * @since 4.0
+ */
+public interface UserTokenHandler {
+
+    /**
+     * The token object returned by this method is expected to uniquely
+     * identify the current user if the context is user specific or to be
+     * <code>null</code> if it is not.
+     *
+     * @param context the execution context
+     *
+     * @return user token that uniquely identifies the user or
+     * <code>null</null> if the context is not user specific.
+     */
+    Object getUserToken(HttpContext context);
+
+}