Metric tests

Metric tests are typically used for exercising hardware abstraction layers (HALs) or interacting directly with lower-level system services. To leverage continuous testing service, metric tests should be built with the google-benchmark framework.

Example

See a sample metric test module setup at: bionic/benchmarks/bionic-benchmarks

Summary of steps

Test module configuration file should use the BUILD_NATIVE_BENCHMARK build rule so that google-benchmark dependencies are included automatically.
Build the test module with make:
```
make -j40 bionic-benchmarks
```

Automatic installation and run with the Trade Federation test harness:

make tradefed-all -j
tradefed.sh run template/local_min --template:map test=bionic-benchmarks

Manually install and run like so:

Push the generated test binary onto device:

adb push ${OUT}/data/benchmarktest/bionic-benchmarks/bionic-benchmarks32 \
  /data/benchmarktest/bionic-benchmarks/bionic-benchmarks32

Execute the test by invoking test binary on device:

adb shell /data/benchmarktest/bionic-benchmarks/bionic-benchmarks32