Android: adds Credentials to BiometryType

[jensdev]

• Allow passing in allowDeviceCredentials to isSensorAvailable and simplePrompt
• Adds Credentials BiometryType to differentiate between https://developer.android.com/reference/androidx/biometric/BiometricManager.Authenticators#BIOMETRIC_STRONG() and https://developer.android.com/reference/androidx/biometric/BiometricManager.Authenticators#DEVICE_CREDENTIAL()
• Android: use android.content.pm.PackageManager to check if it is Fingerprint

[jensdev]

@jayfunk Could you have a look at this?

[jayfunk]

While this does create a prompt, on my android 31 emulator, I am unable to actually create the private and public keys with just device credentials. I get this error:
java.lang.IllegalStateException: At least one biometric must be enrolled to create keys requiring user authentication for every use
Have you been able to get around this? I believe this is somewhat related investigative work I was doing on #225

[jayfunk]

This block is a duplicate of the else block starting on line 101. You should extract these two pieces and re-use them instead.

[jensdev]

I've extracted this bit to a seperate function.

[jayfunk]

While this does create a prompt, on my android 31 emulator, I am unable to actually create the private and public keys with just device credentials. I get this error: java.lang.IllegalStateException: At least one biometric must be enrolled to create keys requiring user authentication for every use Have you been able to get around this? I believe this is somewhat related investigative work I was doing on #225

Here is a screenshot of the emulator doing the device credential only prompt.

[jensdev]

Thank you for reviewing @jayfunk. With regards to the java.lang.IllegalStateException: At least one biometric must be enrolled to create keys requiring user authentication for every use I've not used the function to create keys. I am only using the isSensorAvailable and simplePrompt

[jensdev]

@jayfunk do you have time for another review?