Make ImageInterface use its own context

In a followup cl, the ImageInterface will be queried during incoming
transitions, which have a more limited context. Make a dedicated
ImageInterfaceContext so we can have more control about what functions
we expose.

Bug: 372091092
Test: m nothing --no-skip-soong-tests
Change-Id: Idb320352433cda4b0467226599295056ec47025d