Usabiltity changes to QRCode Scanning Screen

[JasonIsAzn]

Overview

• Add a zoom option
• Remove invalid qrcode checks. This will help when officers have an external qrcode next to our qrcode
• Add a manual button to sign in/sign out (UI wise i thought this would be cool? opinions wanted)
• Keep automatic navigation and added ui feedback

Test

• Test Zoom feature
• Ensure qrcode scanner still works

[mestrada03]

Check the Zoom in/Zoom out functionality. Seems that it works, just not enough to the point where it is noticeable. Could be a phone specific issue as well.

[JasonIsAzn]

Attempting to fix zoom function. Need testing

I attempted to fix zoom funciton, but need it to be tested again. Requesting another review.

[JasonIsAzn]

completely removed zoom feature, may look into this more in the future.
Zoom feauture isn't nesserily needed after removing invalid scans. Now when we have qrcode side by side the shpe one will be detected as intended.
The only reason why we need zoom feature is for member far away from the screen, for this reason only we should still look into zoom feature.

[mestrada03]

lgtm