message: To package support for both 32 bit and 64 bit in single apk, we need different flag
diff: 1. Follow the [Bazel steps for the TF Demo App](https://github.com/tensorflow/tensorflow/tree/master/tensorflow/examples/android#bazel).
  -2. Build the app with Bazel. The demo needs C++11:
  +2. Build the app with Bazel. The demo needs C++11. We configure the fat_apk_cpu flag to package support for 4 hardware variants. You may replace it with --config=android_arm64 on a 64-bit device and --config=android_arm for 32-bit device:
  ```shell
  - bazel build -c opt --cxxopt='--std=c++11' \
  + bazel build -c opt --cxxopt='--std=c++11' --fat_apk_cpu=x86,x86_64,arm64-v8a,armeabi-v7a \
  //tensorflow/contrib/lite/examples/android:tflite_demo
  ```
  