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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/FormattedHeader.java

@@ -0,0 +1,60 @@
+/*
+ * ====================================================================
+ * 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;
+
+import ch.boye.httpclientandroidlib.util.CharArrayBuffer;
+
+/**
+ * An HTTP header which is already formatted.
+ * For example when headers are received, the original formatting
+ * can be preserved. This allows for the header to be sent without
+ * another formatting step.
+ *
+ * @since 4.0
+ */
+public interface FormattedHeader extends Header {
+
+    /**
+     * Obtains the buffer with the formatted header.
+     * The returned buffer MUST NOT be modified.
+     *
+     * @return  the formatted header, in a buffer that must not be modified
+     */
+    CharArrayBuffer getBuffer();
+
+    /**
+     * Obtains the start of the header value in the {@link #getBuffer buffer}.
+     * By accessing the value in the buffer, creation of a temporary string
+     * can be avoided.
+     *
+     * @return  index of the first character of the header value
+     *          in the buffer returned by {@link #getBuffer getBuffer}.
+     */
+    int getValuePos();
+
+}