Benchmarks for streams.

We've been advocating as little usage of streams as possible inside
the system_server, and this is a benchmark showing the costs of using
streams compared to rolling manual logic.

Results on a taimen show that direct route is 2.2x faster (!).

    Trial Report (1 of 2):
      Experiment {instrument=runtime, benchmarkMethod=timeDirect, vm=app_process, parameters={}}
      Results:
        runtime(ns): min=47234.28, 1st qu.=47234.28, median=47234.28, mean=47234.28, 3rd qu.=47234.28, max=47234.28
    Trial Report (2 of 2):
      Experiment {instrument=runtime, benchmarkMethod=timeStreams, vm=app_process, parameters={}}
      Results:
        runtime(ns): min=105660.39, 1st qu.=105660.39, median=105660.39, mean=105660.39, 3rd qu.=105660.39, max=105660.39

Bug: 77808546
Test: vogar --mode app_process --benchmark frameworks/base/core/tests/benchmarks/src/android/util/StreamsBenchmark.java
Change-Id: Iac43a75970eee2c91593316a1b5a45d2c96c476b