[bazel] Add android_benchmark_test rule and sample targets.

Bug: b/40045301
Change-Id: I4c8a3b617170024c7cd907c12bdb487befbc68e3
Reviewed-on: https://skia-review.googlesource.com/c/skia/+/766679
Reviewed-by: Kevin Lubick <kjlubick@google.com>
Commit-Queue: Leandro Lovisolo <lovisolo@google.com>
9 files changed