consolidate mock data. remove unused deps.

[shamilovtim]

Reason for PR

As I was working on Connect I ran into the issue that the mocked data, dependencies and README no longer reflected the reality of the codebase. The connection detail list was no longer accurate. Mock data was very WET and in some cases busted. Our old state manager dependency (legend state) wasn't used at all and was just wrapping the mocks needlessly.

Resolution

• Remove unused dependencies: legend, verite, mmkv, memory level
• Remove unused state manager code
• Consolidate the mock data. Split it out for a couple of separate concerns (e.g. activity)
• Get the the connection detail list working again with mock data