Tink Integration

[cyon1c]

Tink needs to be inserted into the security process.

Currently:

Keystore Generates RSA Keys -> Encrypts plaintext of User keys -> Encrypted Keys stored in SharedPref.

Expected:

Keystore Generates RSA Keys & Tink Generates Key -> Tink Encrypts plaintext of User keys -> RSA Key encrypts Tink Keys -> Encrypted Tink and User Keys stored in SharedPref. #

Relevant Classes - Authmanager.java, AccountManager.java