Misc: Fix Android SDK path in Gradle import tests

compiler/tests-common/tests/org/jetbrains/kotlin/test/KotlinTestUtils.java

@@ -37,6 +37,7 @@ import com.intellij.psi.impl.PsiFileFactoryImpl;
 import com.intellij.rt.execution.junit.FileComparisonFailure;
 import com.intellij.testFramework.LightVirtualFile;
 import com.intellij.testFramework.TestDataFile;
+import com.intellij.util.PathUtil;
 import com.intellij.util.containers.ContainerUtil;
 import junit.framework.TestCase;
 import kotlin.collections.CollectionsKt;
@@ -377,6 +378,7 @@ public class KotlinTestUtils {
         return androidJarFile;
     }
 
+    @NotNull
     public static File findAndroidSdk() {
         String androidSdkProp = System.getProperty("android.sdk");
         File androidSdkDir = androidSdkProp == null ? null : new File(androidSdkProp);
@@ -389,6 +391,10 @@ public class KotlinTestUtils {
         return androidSdkDir;
     }
 
+    public static String getAndroidSdkSystemIndependentPath() {
+        return PathUtil.toSystemIndependentName(findAndroidSdk().getAbsolutePath());
+    }
+
     public static File getAnnotationsJar() {
         return new File(getHomeDirectory(), "compiler/testData/mockJDK/jre/lib/annotations.jar");
     }