SystemUI: Fix couldn't connect to camera when Flashlight is on

Camera couldn't be started when Flashlight is on because CameraDevice
has been used.

Send broadcast in camera, receive the led flashlight intent and close
flashlight, after that user could use camera when re-launch it.

Change-Id: Idb61389d0b8f15192ea534bd28624e5d51f6527c
CRs-Fixed: 814992