Cleanup some IO overhead

app/src/main/java/com/hippo/UriArchiveAccessor.kt

@@ -34,7 +34,7 @@ class UriArchiveAccessor(ctx: Context, private val uri: Uri) {
 
     private external fun openArchive(fd: Int, size: Long): Int
     private external fun extractToByteBuffer(index: Int): ByteBuffer?
-    external fun extractToFd(index: Int, fd: FileDescriptor)
+    external fun extractToFd(index: Int, fd: Int)
     external fun getFilename(index: Int): String
     external fun needPassword(): Boolean
     external fun providePassword(str: String): Boolean

app/src/main/java/com/hippo/ehviewer/gallery/ArchivePageLoader.kt

@@ -144,7 +144,7 @@ class ArchivePageLoader(context: Context, uri: Uri, passwdFlow: Flow<String>) :
             e.printStackTrace()
             return false
         }
-        archiveAccessor.extractToFd(index, fd.fileDescriptor)
+        archiveAccessor.extractToFd(index, fd.fd)
         try {
             fd.close()
         } catch (e: IOException) {