[PM-1817] Expand biometric integrity checks to the account level (#2498)

* Change bio integrity validation to work at account-level

* biometric state migration

* fix account bio valid key storage location during migration

* comment clarification

* fix for iOS extensions not using custom avatar color

src/Core/Abstractions/IPlatformUtilsService.cs

@@ -28,6 +28,7 @@ namespace Bit.Core.Abstractions
         bool SupportsFido2();
         bool SupportsDuo();
         Task<bool> SupportsBiometricAsync();
+        Task<bool> IsBiometricIntegrityValidAsync(string bioIntegritySrcKey = null);
         Task<bool> AuthenticateBiometricAsync(string text = null, string fallbackText = null, Action fallback = null);
         long GetActiveTime();
     }