Fix paste action with KIO >= 5.25

After 5.25, KIO::pasteActionText() (called by Dolphin) no longer allows null
KFileItem destinations, so we need to explicitly create a writable UDSEntry for
"."

CCBUG: 366795

src/kio_gdrive.cpp

@@ -183,7 +183,7 @@ KIO::UDSEntry KIOGDrive::fileToUDSEntry(const FilePtr &origFile, const QString &
             entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IRGRP | S_IROTH);
         }
     } else {
-        entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IXUSR | S_IRGRP | S_IXGRP | S_IROTH | S_IXOTH);
+        entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH);
     }
 
     return entry;
@@ -417,6 +417,14 @@ void KIOGDrive::listDir(const QUrl &url)
         m_cache.insertPath(path + file->title(), file->id());
     }
 
+    // We also need a non-null and writable UDSentry for "."
+    KIO::UDSEntry entry;
+    entry.insert(KIO::UDSEntry::UDS_NAME, QStringLiteral("."));
+    entry.insert(KIO::UDSEntry::UDS_FILE_TYPE, S_IFDIR);
+    entry.insert(KIO::UDSEntry::UDS_SIZE, 0);
+    entry.insert(KIO::UDSEntry::UDS_ACCESS, S_IRUSR | S_IWUSR | S_IXUSR | S_IRGRP | S_IWGRP | S_IXGRP | S_IROTH | S_IXOTH);
+    listEntry(entry);
+
     finished();
 }