* 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
* Initial working version for Android
* Add a fallback for when upgrading from older app version.
* Ensure biometric validity is re-checked on focus
* Only setup biometric integrity key if biometric is turned on.
* Fix styling according to comments
* Fallback for Android 5.
* Improve comment
* Add boilerplate for iOS
* Change BiometricService to public
* Untested iOS implementation.
* Convert IBiometricService to async. Fix code style for iOS.
* Base64 NSData.
* Review comments for Android BiometricService.
* Rename methods in BiometricService to append Async
* Ensure we wait for async SetupBiometricAsync.
* Update BiometricService.cs
Co-authored-by: Kyle Spearrin <kspearrin@users.noreply.github.com>