Fix target conditional for vision simulator

[aaron-foreflight]

Fix for issue #130

[google-cla]

Thanks for your pull request! It looks like this may be your first contribution to a Google open source project. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

View this failed invocation of the CLA check for more information.

For the most up to date status, view the checks section at the bottom of the pull request.

[paulb777]

Thanks for the PR. We'll need a CLA to review. Based on the title, may be similar to #129

[aaron-foreflight]

Thanks for the PR. We'll need a CLA to review. Based on the title, may be similar to #129

CLA signed.

#129 does look similar and the final solution should probably be a combination of these two fixes. I should probably be returning a value for the vision simulator here rather than omitting it.

[andrewheard]

Thanks for the contribution @aaron-foreflight!

[andrewheard]

I think moving #elif TARGET_OS_VISION above #elif TARGET_OS_IOS would allow this to work on both Xcode 15.0 and Xcode 15.1 Beta.

Note: In the current ordering, it'll go in the TARGET_OS_IOS path on Xcode 15.0 where the value of TARGET_OS_IOS is still 1 on visionOS.

[andrewheard]

Thanks for pointing this out! This is now resolved in #132.