android-sdk: Certain files are lost on upgrade

Currently, the android-sdk will install the platform-tools and build-tools into 2 directories that should be outside of the android-sdk cellar, but are not.

Because of this, on an upgrade of the android-sdk, any installations of the platform-tools and build-tools will be lost.

The attached patch fixes this by adding the two additional directories to the existing list of preserved data directories.
So, I actually completely missed that comment at the end of the formula. And it appears to still be correct. It's not installing the android-sdk that causes that platform-tools symlink to get trashed, it's running the sdk.

It looks like we could still add the build-tools to that list, but I'm going to hold off and instead see if the root problem could get fixed upstream.

Thanks for looking into this with me though!
https://github.com/Homebrew/homebrew/pull/30487#