add flatbuffers

commit 6da1cf79d90eb242e7da5318241d42279a3df3ba
Author: Max Burke <max@urbanlogiq.com>
Date:   Sun Jan 19 14:47:28 2020 -0800

    [rust] Add use declarations to Rust-generated bindings for imported FB definitions (#5645)

    * Bugfix for Rust generation of union fields named with language keywords

flatbuffers/samples/android/jni/main.cpp

@@ -0,0 +1,41 @@
+// Copyright 2015 Google Inc. All rights reserved.
+//
+// Licensed 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.
+
+#include <android/log.h>
+
+#include "android_native_app_glue.h"
+#include "animal_generated.h" // Includes "flatbuffers/flatbuffers.h".
+
+void android_main(android_app *) {
+  flatbuffers::FlatBufferBuilder builder;
+  auto name = builder.CreateString("Dog");
+  auto sound = builder.CreateString("Bark");
+  auto animal_buffer = sample::CreateAnimal(builder, name, sound);
+  builder.Finish(animal_buffer);
+
+  // We now have a FlatBuffer that can be stored on disk or sent over a network.
+
+  // ...Code to store on disk or send over a network goes here...
+
+  // Instead, we're going to access it immediately, as if we just recieved this.
+
+  auto animal = sample::GetAnimal(builder.GetBufferPointer());
+
+  assert(animal->name()->str() == "Dog");
+  assert(animal->sound()->str() == "Bark");
+  (void)animal; // To silence "Unused Variable" warnings.
+
+  __android_log_print(ANDROID_LOG_INFO, "FlatBufferSample",
+      "FlatBuffer successfully created and verified.");
+}