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

mobile/android/thirdparty/ch/boye/httpclientandroidlib/client/cache/HttpCacheContext.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.cache;
+
+import ch.boye.httpclientandroidlib.annotation.NotThreadSafe;
+import ch.boye.httpclientandroidlib.client.protocol.HttpClientContext;
+import ch.boye.httpclientandroidlib.protocol.BasicHttpContext;
+import ch.boye.httpclientandroidlib.protocol.HttpContext;
+
+/**
+ * @since 4.3
+ */
+@NotThreadSafe
+public class HttpCacheContext extends HttpClientContext {
+
+    /**
+     * This is the name under which the {@link CacheResponseStatus} of a request
+     * (for example, whether it resulted in a cache hit) will be recorded if an
+     * {@link HttpContext} is provided during execution.
+     */
+    public static final String CACHE_RESPONSE_STATUS = "http.cache.response.status";
+
+    public static HttpCacheContext adapt(final HttpContext context) {
+        if (context instanceof HttpCacheContext) {
+            return (HttpCacheContext) context;
+        } else {
+            return new HttpCacheContext(context);
+        }
+    }
+
+    public static HttpCacheContext create() {
+        return new HttpCacheContext(new BasicHttpContext());
+    }
+
+    public HttpCacheContext(final HttpContext context) {
+        super(context);
+    }
+
+    public HttpCacheContext() {
+        super();
+    }
+
+    public CacheResponseStatus getCacheResponseStatus() {
+        return getAttribute(CACHE_RESPONSE_STATUS, CacheResponseStatus.class);
+    }
+
+}