Making some methods of FUIAuthBaseViewController public to make subclassing easier

[AndriyGo]

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[googlebot]

Thanks for your pull request. It looks like this may be your first contribution to a Google open source project (if not, look below for help). Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please visit https://cla.developers.google.com/ to sign.

Once you've signed (or fixed any issues), please reply here (e.g. I signed it!) and we'll verify it.

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What to do if you already signed the CLA

Individual signers

• It's possible we don't have your GitHub username or you're using a different email address on your commit. Check your existing CLA data and verify that your email is set on your git commits.

Corporate signers

• Your company has a Point of Contact who decides which employees are authorized to participate. Ask your POC to be added to the group of authorized contributors. If you don't know who your Point of Contact is, direct the Google project maintainer to go/cla#troubleshoot (Public version).
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[AndriyGo]

I signed it!

[googlebot]

CLAs look good, thanks!

[googlebot]

CLAs look good, thanks!

[morganchen12]

LGTM, but had some doc comment changes (though it looks like these were existing docs bugs)

[morganchen12]

nit: Displays an alert asking the user to confirm whether or not they want to proceed with the selected provider.

[morganchen12]

nit: with a short delay instead of with a short period of delay.

[morganchen12]

Creates and adds an activity indicator

[morganchen12]

nit: View should be lowercase

[AndriyGo]

@morganchen12 👍

Do you have any idea when this can be added to the latest release?

[morganchen12]

I'll merge it after the comment changes are made, and it'll be out in the the next release (after Firebase's next major version).

[AndriyGo]

@morganchen12 sorry this is my first public PR – do I need to make the comment changes which you specified? Or do I need to approve them somehow?

[morganchen12]

If you make the changes locally and push to the same branch, the PR will update automatically.

[morganchen12]

Looks good, thanks! Expect this to be released in the next two weeks or so.

[AndriyGo]

@morganchen12 thank you!