Camera: Adds longshot commands

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

CRs-Fixed: 514199
Change-Id: I47e4211ca0306347b6546707ed43b90ee3693060
audio: Enumerations for audio usecases

-Add enumerations for audio usecases to handle concurrency

Change-Id: Ided13b37d269db3b4509f4058581d329b5f4739e
Camera: Adds auto HDR Metadata type

- This type is used during auto HDR
  Metadata callbacks.

Change-Id: Ifb25cf57cc987903e696fb0507b72ff882e0ec0d