Testing module doesn't work

[bulantsevajo]

Issue
SwiftPM tests fail on Android because the Testing module cannot be resolved.

Running:
scd test --platform android-arm64-v8a

Results in: error: no such module 'Testing'
Any package that uses: import Testing fails to compile.
For example, tests in https://github.com/apple/swift-collections fail with this error.

Expected
Testing module should be available and work when building SwiftPM tests for Android.