Camera:sepolicy: Added sepolicy for hal_camera & surfaceflinger.

Issue: hal_camera donot have access to find displayservice@1.0
      library's & surfaceflinger donot have access to issue vsync
      callback.
Solution:Added selinux allow rule in hal_camera to find the display
       service libraries & provide access to surfaceflinger to give
       binder callback to camera.

Change-Id: Ia37071827d2b49896dd17900a87e4ff759910873