Update troubleshooting.md

[mikhuang]

I kept having crashes which were resolved after explicitly setting googlePlayServicesVersion.

[hukid]

Thank you for contributing to this project, this PR is great!

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you sign our Contributor License Agreement before we can accept your contribution.
_{You have signed the CLA already but the status is still pending? Let us recheck it.}