Benchmark: Add CSV support

Write benchmark results in a CSV format

Test: adb shell am instrument -w -r -e package com.android.media.benchmark\
      com.android.media.benchmark/androidx.test.runner.AndroidJUnitRunner

Bug: 145226938

Change-Id: I946550f8148a5ba2cb2fb6468fdbd6bf5d16a915
24 files changed