LabGraph Vision implementation

[kritgrover]

Description

Added a new directory that has the android app running object detection on a local video. Results are logged into the Logcat console. (Part of the MLH Fellowship)

The entire commit history can be seen here: https://github.com/kritgrover/mediapipe-lite/commits/master

resolves #108

Type of change

• [x] New feature (non-breaking change which adds functionality)
• [x] This change requires a documentation update

Feature/Issue validation/testing

Please describe the tests [UT/IT] that you ran to verify your changes and relevent result summary. Provide instructions so it can be reproduced. Please also list any relevant details for your test configuration.

• [x] Test A - Ran object detection on multiple local videos and checked for expected resulting logs.
• [x] Test B - Changed controls like "Max Results" and "Minimum Threshold" and got expected results.

Checklist:

• [x] Have you added tests that prove your fix is effective or that this feature works?
• [x] New and existing unit tests pass locally with these changes?
• [x] Has code been commented, particularly in hard-to-understand areas?
• [x] Have you made corresponding changes to the documentation?

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[jfResearchEng]

Most important for this PR: Support the android build using Buck2 (https://buck2.build/) instead of bazel.