Insert an habit on any day

Sometimes , we can't do an habit that we've set for a specific day of the week on the scheduled day but manged to do this on another...But on your app we can't just log this in another day if we've set a habit for certain days of the week (which is already a great feature).
So if I've set to do Yoga on Monday and Wednesday , but I've practice it on Thursday and Wednesday because I've been too busy at Monday I can't register it...

Start by tracing the habit scheduling and logging flow in the Android app. Determine where a habit's scheduled day is validated, then make completion on another day possible while preserving the existing weekly schedule. Done means a habit scheduled for one day can be recorded on a different day.

Written by the indexing model from the issue text.