FileSystem.cpExternal creates a invalid file if the file already access

[imanshul]

react-native: 0.62.0
react-native-file-access: 1.7.1
Platform: Android

Bug
When trying to copy the file from local cache to the downloads file and if the file already access it is creating a new file with. (1)..(2) in name but it's adding that after extension resulting in a invalid file.

To reproduce
Download same file again using FileSystem.cpExternal giving same name

[alpha0010]

The numbering is due to android permissions sandbox, but putting it after the extension is not correct. I will have to see if there is a way to force the correct file extension with android's api.