[CI] Update android CI to reflect current buildkite

Summary:
Update android CI yaml file to reflect current buildkite steps

https://linear.app/comm/issue/ENG-1079

Test Plan: Inspect https://buildkite.com/comm/android-build/steps

Reviewers: ashoat, varun, max

Reviewed By: ashoat, varun, max

Subscribers: max, tomek, atul

Differential Revision: https://phab.comm.dev/D5863