[Pandora] - Implement refined Security.proto

* Add SecurityStorage.kt to implemement SecurityStorage service
* Modify Security.kt
* Update host.proto and Host.kt
* Adapt mmi2grpc accordingly

Bug: 260264302
Bug: 245578454
Test: atest pts-bot
Ignore-AOSP-First: Cherry-picked from AOSP
Merged-In: Ie73698ed6f465a9da7c4e785d778dadf90dec87e
Change-Id: Ie73698ed6f465a9da7c4e785d778dadf90dec87e