Add native lib src files and android binaries

[cmonfortep]

Task/Issue URL: https://app.asana.com/0/0/1204068537088006/f

Description

Adds native library src code to repository. Include android libsodium builds.

Structure will be:

• root
• root/native_lib/
• root/native_lib/third-party/

Steps to test this PR

Feature 1

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[cmonfortep]

@ayoy just removed the unuse method. good catch