Pip Cam for android, on the surface, looks to be a legitimate camera app (filters and all that jazz), but actively takes over your phone system and displays invasive advertisements over every other app you are using...all of the time.
I just spent the last hour trying to work out what was making my mothers phone (Razr) unusable due to an invasion of ads, and within that hour I got shown around 150+ ads that, some of them couldn't be skipped at all (or just closed instantly).
As it transpires, after a bit of digging around to wtf she had installed, I noticed that Android had mentioned on the dtopdown bar that Pip Cam was "drawing" over other apps...not liking the sound of a camera app being able to do that, I uninstalled it...the second I did....the search icon that was glued to the screen was there no longer, and all the ads stopped instantly.
I provide the link to the Play Store listing for it purely so you can see which it is, and which you should to remove if you come across anybody else with this issue:
https://play.google....pcamera&hl=en_GB~Stephen