Add declarative storage domains, device test runner, actions, and host orchestration engine

This CL implements the core features of the Automated Backup and Restore testing framework and host-driven orchestration engine:
- Introduces declarative StorageDomain classes to define target on-device state safely.
- Adds device-side BackupRestoreTestRunner instrumentation runner capable of dynamically parsing and executing action payloads.
- Includes prebuilt PopulateStorageAction and AssertStorageAction to manipulate and verify application sandbox data.
- Provides host-side BackupRestoreControllerImpl engine to drive backup/restore sequences via ADB and mock logging.
- Includes JUnit 5 BackupRestoreExtension integration for seamless device-managed lifecycle testing.
- Comprehensive unit test coverage for both the device engine and JUnit extension.

Relnote: N/A
Bug: 537118605, 519009084
Test: ./gradlew :test:backup:backup-host:test :test:backup:backup:lintRelease
Change-Id: Idb89517f89d55400b791a47738fc85e412d33abd