Traces: Add restricted_trace_perf.py script for Android We've been using restricted_trace_perf.py to gather numbers on Android devices. The script uses angle_perftests and records: - Wall time per frame - GPU time per frame - CPU time per frame - GPU power per frame - CPU power per frame - GPU memory per frame It reports numbers to the terminal and creates a spreadsheet at the end. A typical command to run it would be: python3 restricted_trace_perf.py --fixedtime 10 --power \ --output-tag <tag> --loop-count 5 Power numbers are only available on Pixel 6 as we read directly from power rails. Also included is a gpumem shell script run on the Android device, and a power_denoising script that deactivates a number of services to reduce variance. The former is invoked automatically, the latter is only invoked by hand. Bug: angleproject:6970 Change-Id: I11fd346790565b5efcda228f43dc36dd41025642 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3432821 Reviewed-by: Roman Lavrov <romanl@google.com> Reviewed-by: Jamie Madill <jmadill@chromium.org> Commit-Queue: Cody Northrop <cnorthrop@google.com>