Creates a NanoAppStateManager at ContextHubService

Created to decouple the internal nanoapp state management at the
service with ContextHubService class

Bug: 67734082
Test: Compile and flash, run CHQTS and verify pass, also verify with
logs that the cache is updated accordingly after load/unload/query
Change-Id: Ie25460e7f8d903cdcb22f0a1c4870bb93ccbad3e