Prepare for bazel to run with shrunken r8.jar

With Android Platform SDK build tools 30.0.1 the r8.jar included is shrunken (r8lib),
so some of the internal APIs are not available. Change the integration to deal with
that.

This uses reflection to access the internal APIs if available and otherwise stick to
the public API.

If a shrunked r8.jar is used, bazel will not support the configuration of "check main dex"
and "minimal main dex" flags which are not supported in the public D8 API.

This will also make it possible for bazel to pull r8.jar from Google Maven, where only
the shrunken r8.jar is published.

RELNOTES: None.
PiperOrigin-RevId: 326619633
4 files changed
tree: ef0ca94ecd2ec3931035d32bb607f9b2911749af
  1. .bazelci/
  2. examples/
  3. scripts/
  4. site/
  5. src/
  6. third_party/
  7. tools/
  8. .bazelrc
  9. .gitattributes
  10. .gitignore
  11. AUTHORS
  12. BUILD
  13. CHANGELOG.md
  14. CODEBASE.md
  15. CODEOWNERS
  16. combine_distfiles.py
  17. combine_distfiles_to_tar.sh
  18. compile.sh
  19. CONTRIBUTING.md
  20. CONTRIBUTORS
  21. distdir.bzl
  22. ISSUE_TEMPLATE.md
  23. LICENSE
  24. README.md
  25. WORKSPACE
README.md

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