android: Convert MinimalDocumentFile to Kotlin

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/MinimalDocumentFile.java

@@ -1,28 +0,0 @@
-package org.yuzu.yuzu_emu.model;
-
-import android.net.Uri;
-import android.provider.DocumentsContract;
-
-public class MinimalDocumentFile {
-    private final String filename;
-    private final Uri uri;
-    private final String mimeType;
-
-    public MinimalDocumentFile(String filename, String mimeType, Uri uri) {
-        this.filename = filename;
-        this.mimeType = mimeType;
-        this.uri = uri;
-    }
-
-    public String getFilename() {
-        return filename;
-    }
-
-    public Uri getUri() {
-        return uri;
-    }
-
-    public boolean isDirectory() {
-        return mimeType.equals(DocumentsContract.Document.MIME_TYPE_DIR);
-    }
-}

src/android/app/src/main/java/org/yuzu/yuzu_emu/model/MinimalDocumentFile.kt

@@ -0,0 +1,8 @@
+package org.yuzu.yuzu_emu.model
+
+import android.net.Uri
+import android.provider.DocumentsContract
+
+class MinimalDocumentFile(val filename: String, mimeType: String, val uri: Uri) {
+    val isDirectory: Boolean = mimeType == DocumentsContract.Document.MIME_TYPE_DIR
+}