[Nix] Support building Android through gradle on Linux

Summary:
Pick some of the relevant work from
https://phab.comm.dev/D4433 which can be used to
build android

Test Plan:
From a x86_64-linux machine:
Follow existing directions to download android sdk and ndk

nix develop
yarn cleaninstall # download node_modules
cd native/android && ./gradlew bundleRelease --no-daemon

Reviewers: ashoat, varun

Reviewed By: ashoat, varun

Subscribers: ashoat, tomek, adrian, abosh

Differential Revision: https://phab.comm.dev/D4483