Fixes #4704: Remove 'Please Wait' dialog and do task in background

[ShashwatKedia]

Description (required)

Fixes #4704

What changes did you make and why?

Implemented the flow, as discussed here. Changed the logic of the upload flow quite a lot to calculate and store the image quality of all the images at once and display the problems dialog as soon as the image comes into play.

Tests performed (required)

Tested prodDebug on OnePlus Nord CE 2 Lite with API level 31.

Screencast of the app after changes were implemented

Link to screencast

[misaochan]

Have not tested this, but the screencast looks good to me.

[ShashwatKedia]

@nicolas-raoul @sivaraam could you please take a look at this PR :)

[ShashwatKedia]

@nicolas-raoul @sivaraam could either of you please take a look at this, if you find this worthy enough :)

[nicolas-raoul]

With this branch I still see the Please wait dialog in-between images, is that expected?

[nicolas-raoul]

screen-20240327-155440.mp4

[ShashwatKedia]

With this branch I still see the Please wait dialog in-between images, is that expected?

@nicolas-raoul , Please Wait dialog will have to be there, because caption has to be checked everytime user hits submit button (as it can be changed by user). What I have done is checking the quality of the image as soon as it's loaded (and storing that of the next ones), instead of when user enters all description and hits submit, just to be told that the image is already present on Commons, etc. Here is the flow I implemented and screencast is present in the description of this PR. Please let me know your thoughts on this :)

[nicolas-raoul]

Ah understood I had forgotten about title check thanks! :-)