Move Camera HAL 3.0 reference implementation.

Moved files to a subdir to allow reference implementations
of other versions to join this same space without conflict.

Chery picked from master.

BUG: b/31117512
TEST: lunch bullhead-eng, make -j32, m -j32 camera.default
Change-Id: I9bc3047bd3c00c53ce4d4e4f2070d8ee1453c936
14 files changed