Refactors IContextHubWrapper to use ContextHubInfo

This is the first part of a series of CLs that will abstract out the
HIDL semantics of the Context Hub HAL proxies. In this CL, we rewrite
the getHubs() interface in the IContextHubWrapper to use the framework
semantics (ContextHubInfo).

Bug: 194285834
Test: Presubmit
Change-Id: I4d45aee965d5e46a301186578b83b5367b839f3d
3 files changed