Android support

[marcprux]

Motivation

This package wasn't building on Android, causing various dependent packages to also fail to build.

Modifications

Add the necessary import(Android) to successfully build.

Result

The package can now be built for Android.

Test Plan

Added CI to build and run against an Android emulator using swift-android-action.

[FranzBusch]

Thanks for opening this PR. At this point we can't take this PR until we get an officially published Android toolchain from swift.org. See swiftlang/github-workflows#106 (comment).

My hope is the Android WG together with the Platforms Steering Group can sort this out soon and we can add Android CI to all of our repos.

[simonjbeaumont]

Given @FranzBusch's message, I'll mark this as blocked for now. But thanks for taking the time to make the updates!

[marcprux]

How about if I remove the CI but leave in the fix for Lock.swift? It's just a one-line conditional import that will prevent build failures for dependent packages that are trying to build for Android. Similar PRs have been accepted by numerous other apple repos…

[FranzBusch]

How about if I remove the CI but leave in the fix for Lock.swift? It's just a one-line conditional import that will prevent build failures for dependent packages that are trying to build for Android. Similar PRs have been accepted by numerous other apple repos…

Yes please. Happy to take patches that fix Android!.

[marcprux]

I've removed the CI.

[czechboy0]

@FranzBusch can you update your review? I'd prefer not to have to admin merge here :)

[diederich]

Thank you! 🙏
I just stumbled over this after also doing the exact same fix locally. It sounds like we could get this in as is and have a working version for Android?

[marcprux]

Yeah, it looks like everyone approved, so we just need to merge this 1-liner import fix. @FranzBusch or @simonjbeaumont, maybe?