[Issue](Only android) user flow of confirm picture is wrong

[sync-by-unito]

(Only Android) Camera update is something weird, the user flow is

1. take a photo
2. photo confirm page
3. when user press the previous step button(upper left button) then it back to camera page, it’s expectation. However, when user press the android back button then it will back to main page directly. The expectation android back button or previous step button should be the same.

User story
As a Capture App user, I want the confirm button and it could work smoothly after I take a photo so that I can let the right photo upload on Numbers network.

Priority High

┆Issue is synchronized with this Asana task by Unito
┆Created By: Kenny Hung

[sync-by-unito]

➤ Kenny Hung commented:

Scott Yan 在麻煩幫我Review一下User story，感謝

[sync-by-unito]

➤ Sam commented:

Here is the PR ( #2092 )