[Proposal]Replace bazel build command with the binary provided from tensorflow document

[jsrimr]

bazel build command in specifications/frameworks/tflite/android/build.sh requires a lot of dependencies, like appropriate version of bazel, Android SDK and NDK. It's burdensome.

I found that the resulted binary is provided in here which is form https://www.tensorflow.org/lite/performance/measurement.

I commented out

#   --config=android_arm \
#   --cxxopt='--std=c++11' \
#   tensorflow/lite/tools/benchmark:benchmark_model

these lines and saved the downloaded binary in {tensorflow_dir}/bazel-bin/tensorflow/lite/tools/benchmark/benchmark_model

Then,

python ${FAI_PEP_DIR}/benchmarking/run_bench.py -b "${BENCHMARK_FILE}" --config_dir "${CONFIG_DIR}"

executed without problems.

Below is my configuration.

{
  \"--commit\": \"master\",
  \"--exec_dir\": \"${CONFIG_DIR}/exec\",
  \"--framework\": \"tflite\",
  \"--local_reporter\": \"${CONFIG_DIR}/reporter\",
  \"--model_cache\": \"${CONFIG_DIR}/model_cache\",
  \"--platforms\": \"android\",
  \"--remote_repository\": \"origin\",
  \"--repo\": \"git\",
  \"--repo_dir\": \"${REPO_DIR}\",
  \"--tmp_model_dir\": \"${CONFIG_DIR}/tmp_model_dir\",
  \"--root_model_dir\": \"${CONFIG_DIR}/root_model_dir\",
  \"--screen_reporter\": null
}