Fix Kotlin compilation errors in build.gradle.kts

- add missing imports for java.util.zip.ZipEntry and ZipFile
- add explicit type annotation ZipEntry to the lambda parameter
- replace entry.isDirectory with !entry.name.endsWith("/") since ZipEntry has no isDirectory property

Author: leotm

packages/react-native/ReactAndroid/build.gradle.kts

@@ -10,9 +10,12 @@ import com.facebook.react.internal.PrivateReactExtension
 import com.facebook.react.tasks.internal.*
 import com.facebook.react.tasks.internal.utils.*
 import de.undercouch.gradle.tasks.download.Download
+import java.io.File
 import java.nio.file.Paths
 import org.jetbrains.kotlin.gradle.tasks.KotlinCompile
 import org.gradle.kotlin.dsl.*
+import java.util.zip.ZipEntry
+import java.util.zip.ZipFile
 
 plugins {
   id("maven-publish")
@@ -463,15 +466,15 @@ val prepareFbjni by
         headersOutputDir.mkdirs()
         libsOutputDir.mkdirs()
         // Extract only the fbjni headers from the AAR
-        val zip = java.util.zip.ZipFile(inputAar)
+        val zip = ZipFile(inputAar)
         try {
-          zip.entries().asSequence().forEach { entry ->
+          zip.entries().asSequence().forEach { entry: ZipEntry ->
             when {
               entry.name.startsWith("prefab/modules/fbjni/include/fbjni/") -> {
                 // Extract headers
                 val destFile = File(headersOutputDir, entry.name.removePrefix("prefab/modules/fbjni/include/"))
                 destFile.parentFile.mkdirs()
-                if (!entry.isDirectory) {
+                if (!entry.name.endsWith("/")) {
                   destFile.outputStream().use { output ->
                     zip.getInputStream(entry).use { input ->
                       input.copyTo(output)
@@ -483,7 +486,7 @@ val prepareFbjni by
                 // Extract .so files to prefab_package directory
                 val destFile = File(libsOutputDir, entry.name.substringAfter("android."))
                 destFile.parentFile.mkdirs()
-                if (!entry.isDirectory) {
+                if (!entry.name.endsWith("/")) {
                   destFile.outputStream().use { output ->
                     zip.getInputStream(entry).use { input ->
                       input.copyTo(output)