Add missing imports

Author: smowton

java/kotlin-extractor/src/main/kotlin/KotlinFileExtractor.kt

@@ -29,12 +29,14 @@ import org.jetbrains.kotlin.ir.util.constructors
 import org.jetbrains.kotlin.ir.util.fqNameWhenAvailable
 import org.jetbrains.kotlin.ir.util.hasAnnotation
 import org.jetbrains.kotlin.ir.util.hasInterfaceParent
+import org.jetbrains.kotlin.ir.util.isAnnotationClass
 import org.jetbrains.kotlin.ir.util.isAnonymousObject
 import org.jetbrains.kotlin.ir.util.isFakeOverride
 import org.jetbrains.kotlin.ir.util.isFunctionOrKFunction
 import org.jetbrains.kotlin.ir.util.isInterface
 import org.jetbrains.kotlin.ir.util.isLocal
 import org.jetbrains.kotlin.ir.util.isNonCompanionObject
+import org.jetbrains.kotlin.ir.util.isObject
 import org.jetbrains.kotlin.ir.util.isSuspend
 import org.jetbrains.kotlin.ir.util.isSuspendFunctionOrKFunction
 import org.jetbrains.kotlin.ir.util.isVararg