Implement Rust-owned Android Keystore secure storage (#93)

crates/storage/Cargo.toml

@@ -92,6 +92,7 @@ zbus-secret-service-keyring-store = { workspace = true, optional = true }
 arboard = { workspace = true, optional = true }
 
 [dev-dependencies]
+aes-gcm = "0.11.1"
 hex = "0.4"
 keepass = { workspace = true, features = ["save_kdbx4"] }
 nix = { version = "0.31", features = ["fs"] }