Finally got it... For me if was not only Kika key board. Each time I factory reset, system install updates, of which one of the updates was of "XOS-Launcher, Theme, Wallpaper". The moments this updates are installed, my phone home screen refreshes and changes the display, icon color and also it shows Google custom search. When clicked on it, it goes to searching dog.com.
Now the solution is just go to play store and uninstall the "XOS-Launcher, Theme, Wallpaper".. So that updates gets uninstalled and your problem is resolved...
Thank you
Do let me know if this helps...