Camera: Add stream use case support

Stream use case indicates the purpose of a camera stream. By using
stream use case, the camera device doesn't need to use the stream's
format and immediate consumer surface type as heuristics to figure
out what the stream is for.

Bug: 200307880
Test: Camera CTS
Change-Id: I390c0e4fcc1272723784c358c6f0334e1dbbd848