Update Kotlin to 2.1.10: Fix Annotation issue 2

Author: fatalcoder524

app/src/main/java/com/github/capntrips/kernelflasher/ui/screens/backups/BackupsViewModel.kt

@@ -83,8 +83,8 @@ class BackupsViewModel(
     fun refresh(context: Context) {
         val oldDir = context.getExternalFilesDir(null)
         val oldBackupsDir = File(oldDir, "backups")
-        @Deprecated("Backup migration will be removed in the first stable release", level = DeprecationLevel.WARNING)
-        _needsMigration.value = oldBackupsDir.exists() && (oldBackupsDir.listFiles()?.isNotEmpty() == true)
+        // Deprecated: Backup migration will be removed in the first stable release
+        _needsMigration.value = oldBackupsDir.exists() && oldBackupsDir.listFiles()?.size!! > 0
         @SuppressLint("SdCardPath")
         val externalDir = File("/sdcard/KernelFlasher")
         val backupsDir = fileSystemManager.getFile("$externalDir/backups")