Check `NetworkRequest#mDestroyed` before each network request?

[stefan-niedermann]

I recently ran into an issue while trying to make a network request on an NextcloudAPI instance, on which I called close() before.

Of course, it failed, but at an odd place, that I didn't expected (I think context was null at some place).

This made me wondering why we do check for NetworkRequest#mDestroyed when connecting, but not before each request. Wouldn't make it sense to add this check also at the beginning of AidlNetworkRequest#performNetworkRequestV2 and throw a more meaningful IllegalStateException or something alike?

cc @David-Development

[David-Development]

Yes, that makes perfect sense to me. Would for sure improve error handling a lot (and make it easier for devs to find the error in case something goes wrong).