Unset ANDROID_NDK_ROOT for CI (swiftlang/swift-driver#1879)

Author: marcprux

.github/workflows/ci.yml

@@ -38,12 +38,13 @@ jobs:
         run: |
           brew install skiptools/skip/skip
           skip android sdk install --version ${{ matrix.swift }}
-          skip android build
+          # https://github.com/swiftlang/swift-driver/pull/1879
+          ANDROID_NDK_ROOT="" skip android build
       - name: "Test Swift Package with Skip Android"
         uses: reactivecircus/android-emulator-runner@v2
         with:
           api-level: 29
-          script: skip android test
+          script: ANDROID_NDK_ROOT="" skip android test
       - name: "Test Swift Package on macOS"
         run: swift test
       - name: "Test Swift Package on iOS"

Sources/AndroidSystem/Internals/CInterop.swift

@@ -18,7 +18,6 @@ import Musl
 #elseif canImport(WASILibc)
 import WASILibc
 #elseif canImport(Android)
-@_exported import SwiftAndroid
 @_implementationOnly import AndroidNDK
 import Android
 #else