[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