fix initial permission

Signed-off-by: alperozturk <alper_ozturk@proton.me>

Author: alperozturk96

app/src/main/java/com/owncloud/android/ui/fragment/FileDetailsSharingProcessFragment.kt

@@ -174,7 +174,7 @@ class FileDetailsSharingProcessFragment :
 
         fileActivity = activity as FileActivity?
         capabilities = CapabilityUtils.getCapability(context)
-        permission = sharePermissionManager.getMaximumPermission(isFolder())
+        permission = share?.permissions ?: sharePermissionManager.getMaximumPermission(isFolder())
 
         requireNotNull(fileActivity) { "FileActivity may not be null" }