Deprecated class MasterKeys

[open-driven]

Hello,

It would be a good practice to replace the deprecated class MasterKeys by MasterKey as per https://developer.android.com/reference/kotlin/androidx/security/crypto/MasterKeys (Java: https://developer.android.com/reference/androidx/security/crypto/MasterKeys)

CovidCertificate-App-Android/wallet/src/main/java/ch/admin/bag/covidcertificate/wallet/data/CertificateStorage.kt

Line 103 in 060a40c

val masterKeyAlias: String = MasterKeys.getOrCreate(MasterKeys.AES256_GCM_SPEC)

[goebelUB]

Thanks a lot for the suggestion.
It seems that the MasterKey class was added in version 1.1.0-alpha1. We currently depend on version 1.0.0, which is the current stable release.