trace_processor: add filter benchmarks and refactor existing
trace_processor: add filter benchmarks and refactor existing

This adds a couple ofnew benchmark for measuring the performance of
filtering on id in a child table.

We also refactor some existing benchmarks to make things more
consistent.

Change-Id: Iaa2685068292bffac7d7b079a97fe196cf3ea665
google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto,google/perfetto