Removed littlemock dependency and cleanup

The tests_camera classes are legacy tests that have not been
built for nearly 4 years. This removes those classes and removes
the littlemock and dexmaker dependencies that are no longer
needed.

Bug: 32912773
Test: build, install and run using am instrument
Change-Id: I623d52fd5471f75622c2175061467ad5519dad13
21 files changed