Implement Android TOTP cached discovery and search (#110)

android/README.md

@@ -10,6 +10,8 @@ Home renders Rust-owned [Git activity and HTTPS synchronization](../docs/android
 Passwords and Preferences share [Rust-owned biometric authentication](../docs/android/authentication.md).
 CameraX GPG scanning and QR export are described in
 [key transfer](../docs/android/key-transfer.md).
+The TOTP destination uses [cached discovery and search](../docs/android/totp-discovery.md)
+while locked, with authenticated incremental refresh for new or changed entries.
 Remaining feature screens retain their milestone issues. The full [CI and emulator workflow](../docs/android/ci.md) documents the
 ARM-only runner/toolchain policy and artifact audits.