Camera: Add meta data types for meta data callback

Add meta data callback types in order to reuse same callback
path for diffrent data types.

Change-Id: If8c6079c8a9a1fa7b3e708b6c5d9d04240509e2e
Camera: Adds longshot commands

- This change adds two new camera commands
  for enabling/disabling longshot mode.

CRs-Fixed: 514199
Change-Id: I47e4211ca0306347b6546707ed43b90ee3693060
Camera: Adds auto HDR Metadata type

- This type is used during auto HDR
  Metadata callbacks.