[RTT] LCI/LCR to System API - unparsed

Move LCI/LCR to a System API - unparsed:
- Punting parsing for future release
- Not widely available in APs for testing
- Usability/deployment unclear

Bug: 71643239
Bug: 73088768
Test: unit tests & sanity integration tests
Change-Id: Idd3bded55e887abbad6c51b00b31e75c859ba579