Third-Party Import of: https://github.com/square/leakcanary
Request Document: go/android3p
For CL Reviewers: go/android3p#reviewing-a-cl
For Build Team: go/ab-third-party-imports
Bug: http://b/309158429
Original import of the code can be found at: https://googleplex-android.googlesource.com/platform/external/leakcanary2/+/refs/heads/third-party-review.
Security Questionnaire: http://b/309158429#comment1

Test: Presubmit

Change-Id: I7b975b9fe08b9668a088a68d1851729d642c1285