[GitHub CI] Update Protobuf logic for Android Build

Summary:
Github CI doesn't like "make install" so the protobuf install script
was always failing to place the artifacts. Instead, use another step to install
protobuf instead.

Part of https://linear.app/comm/issue/ENG-2563

Test Plan: https://github.com/CommE2E/comm/actions/runs/3799181401/jobs/6461469446

Reviewers: varun, atul, ashoat

Reviewed By: ashoat

Subscribers: ashoat, tomek

Differential Revision: https://phab.comm.dev/D6106