Camera: Remove link time depenedencies on proprietary libraries.

Use dlopen/dlsym/dlclose to load functions at runtime, instead of
linking them at link time.

Bug: 6815609
Change-Id: I2c8c01e735ab179ce8d1390a23eb9379723fb61a
Signed-off-by: Iliyan Malchev <malchev@google.com>