Change default Android SDK build command

[jakepetroules]

Updated default build command for Android SDK to use 'swift build' instead of 'swift build --build-system native'.

The 4/27 snapshot contains the requisite changes for Android to work.

For Wasm, we want to wait until swiftlang/swift-build#1348 lands before unpinning.

[marcprux]

I think the fix in swift-android-sdk#3 should resolve the nightly-main build errors. Do you want to pull those changes into this PR, or should I file a separate PR against swiftlang/github-workflows? (I had filed it against swift-android-sdk/github-workflows because I don't have permission to run the workflows in swiftlang/github-workflows for testing).

[jakepetroules]

Thanks, I incorporated your changes.

[marcprux]

It looks like it is still failing, but the new log message indicates that it is using the right host toolchain:

** Host toolchain for Android build: /home/runner/.swift-toolchains/swift-DEVELOPMENT-SNAPSHOT-2026-04-28-a/usr/bin/swift

That new failure seems to be coming from:

find: ‘/home/runner/work/github-workflows/github-workflows/tests/TestPackage/.build/x86_64-unknown-linux-android28/debug’: No such file or directory

Should we be expecting a different output folder?

[marcprux]

I think the issue here is that swift-build changed where they are outputting the tests, which is going to break the assumptions we make in the Android testing support here, as well as in skip (skiptools/skipstone#244) and the swift-android-action GitHub workflow (skiptools/swift-android-action#21).

So for example, we need to change the assumption that the test case is built at .build/aarch64-unknown-linux-android28/debug/swift-algorithmsPackageTests.xctest and instead copy it from .build/out/Products/Debug-android/SwiftAlgorithmsTests-test-runner.