Greenify is the key !
Hey people,
I had the same problem on S4,S5 and Note 3. I've already tried all the solutions i found here but the process was always there x(
...so here what i figured out :
ALL apps that use (Dropbox,Viber,Tango,Yahoo,What's App....) the Camera App could cause this process to appear and obviously we can't uninstall all this Apps ^_^ so i tried to hibernate all this App using
Greenify and it works

I've tried this on multiple Samsung devices and it worked for each one of them

So solution is :
1 - Install
Greenify and Hibernate all Apps using Camera specially Social Apps
2- Wipe cache ( Recovery )
3- Recalibrate the battery ( Battery Calibration App )
And you're good to go
