[Android] Avoid building protobuf test suite when install protoc

Summary:
We don't need to run the test suite, and seems to fail in a
non-deterministic way.

https://linear.app/comm/issue/ENG-2700

Test Plan: Android CI gate

Reviewers: atul, ashoat, varun, max, tomek

Reviewed By: ashoat

Differential Revision: https://phab.comm.dev/D6238