Thanks for sharing your requirements, @tasadduq786.
Are you familiar with the auto-send setting in General Settings > Form management? It is under the "Form submission" heading. If you turn that on, users do need to tap the save button but that will automatically trigger submission.
The other feature I would suggest that you explore is creating Android shortcuts to specific forms. See the documentation.
With those two features, you can have a workflow where the person taking the survey taps your survey form directly, fills it out, saves it (and auto-sends) and then goes back to the Android landing screen where they can see your form. You can clear out all other icons from the Android landing screen so that your form is very clearly identifiable.
In order for Collect not to open after a form has been saved, you will need to make sure it is out of memory before tapping on the Android desktop shortcut. How this is done varies by Android device so please ask if that workflow would work for you but you're not sure how to remove Collect from memory.