Revert "CameraClient: Enables meta data notifications."

This reverts commit b239539a614a8bc47e4b3b00516f837a2951d723.
Revert "Camera: Enable Histogram feature."

This reverts commit 5b2ef3b61079759541a6153a9897e447f72c9ee9.

Conflicts:
	services/camera/libcameraservice/api1/CameraClient.cpp