camera: Remove deprecated QCOM camera hacks

Change-Id: If48c5b7c904d26ec2a8307fa690f983660fd7b5a
CameraClient: Enables meta data notifications

- Adds the needed functionality for enabling/disabling
  metadata messages depending on the camera client
  commands.

Change-Id: Iab597d5519b8fb85ee21c824ec19e9aaec9b5219
CameraService: Adds support for longshot mode

- This change introduces additional functionality inside
  CameraClient for supporting continuous compressed data
  callbacks. This is needed for 'Burst/Long shot' mode
  where we could have indefinite number of callbacks after
  capture is triggered.

CRs-Fixed: 514199
Change-Id: I8b155e305a836729b071e5388a7046c6347bb9f3
Merge remote-tracking branch 'cm/cm-10.2' into HEAD