Add support for BiometricPrompt.Builder.setAllowedAuthenticators

[stjepanbanek]

Currently there is no way to force security level on biometric prompts, which can be a security issue on some projects
There is a method in native builder for BiometricPrompt that could be exposed in Goldfinger API

[Aksi0m]

Since this feature is added in Android R and the Android R SDK is still in preview mode I would suggest that we wait with this implementation and prioritise the release of Goldfinger with updated version of androix.biometric (1.0.1)