Store biometry key for each PowerAuthSDK instance #621
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This PR modifies how the
PowerAuthSDKclass on Android internally stores biometry-related encryption keys. In previous versions, the key was shared between multiplePowerAuthSDKinstances. Now, the shared key is only used if the activation has already configured a biometric factor. Once the factor using the shared key is removed, or the entire activation is removed, a per-instance key will be created during the next biometric setup.This backward compatibility feature can be disabled in the
PowerAuthKeychainConfigurationif required by the application. For instance, if the application uses multiple instances ofPowerAuthSDK, it is important to disable this feature to ensure the shared key is immediately forgotten.This PR is also back-ported to releases 1.7.x and 1.8.x (#626, #627)