GitLab

This CL:
- Generates monochrome_python_tests.pydeps using --gn-paths flag
- Adds run_isolated_script_test.py data deps to
  monochrome_public_apk_checker.py
- Adds //testing:run_isolated_script_test target to collect the data
deps for monochrome_public_apk_checker.py

BUG=1138758

Change-Id: Ifffa033368980923e2587e52ff50d35eeae2f271
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2483664Reviewed-by: Andrew Grieve <agrieve@chromium.org>
Reviewed-by: Dirk Pranke <dpranke@google.com>
Commit-Queue: Peter Kotwicz <pkotwicz@chromium.org>
Cr-Commit-Position: refs/heads/master@{#818597}