Get rid of `FileUtils.getFileDescriptorOwner` about deltachat-android HOT 2 OPEN

did some research: the function was introduced in 2016 at signalapp/Signal-Android@f2b81d8 to fix signalapp/Signal-Android#5381

the signal-bug seemed to be introduced shortly before by disallowing file:-uri alltogether.

the fix allows file:-uri unless they are created by the app itself.

tbh, not sure what the idea of that is and if that would affect us at all - we're only creating files in the internal app-space, and there the share-to-delta should not have access at all

from deltachat-android.

File URLs are probably avoided for security reasons, so other apps cannot "share" to Delta Chat a file URL to its own accounts.toml or other easy-to-guess filename. Smart Voice Recorder is some app that passes file URLs to Signal and they wanted to support it so allowed file URLs as long as they don't point to internal files of the app itself.

we're only creating files in the internal app-space, and there the share-to-delta should not have access at all

The other app does not need to have access to Delta Chat files such as accounts.toml to guess the URL and pass it to Delta Chat.

from deltachat-android.