Feature/biometrics

[TobiCrackIT]

• Authentication with PIN ans biometrics

[scotopic]

@TobiCrackIT - add a list of URLs where you got the icons

[TobiCrackIT]

@scotopic https://www.flaticon.com/free-icon/padlock_3064197?term=padlock&page=1&position=4&page=1&position=4&related_id=3064197&origin=search

https://www.flaticon.com/free-icon/fingerprint_2313181?term=fingerprint&page=1&position=4&page=1&position=4&related_id=2313181&origin=search

[TobiCrackIT]

@scotopic, this PR has been updated to make the biometrics feature work as required.

[scotopic]

Android bug

1. Install app from scratch
2. Create a new wallet
3. Click settings > Enter pin
4. Background the app
5. Foreground the app ( see the pin entry screen )

• EXPECTED: No back button is visible
• ACTUAL: Back button visible and takes you to the Secret Phrase view

[scotopic]

iOS bug

1. Settings > Enable "Unlock with biometrics"
2. Once the auth view comes up > click Cancel

• ACTUAL: Another view appears to be added on the stack. Can never cancel out to enter the PIN.
• EXPECTED: Cancel should remove the biometrics dialog and allow access to the PIN UI

[scotopic]

iOS issue:

1. Settings > Enable "Unlock with biometrics"
2. Tap on "Unlock with biometrics" to disable and authenticate the biometrics.

• EXPECTED: Biometrics is disabled once the user is authenticated.
• ACTUAL: PIN UI is shown even after the biometrics is authenticated.

[TobiCrackIT]

@scotopic , the issues raised have been fixed