I have the same issue but it seems to be different than what is here. The stock browser (Internet) on my Samsung Galaxy Prevail LTE triggers AVG Antivirus and brings me to a so called safe page as it brought me to a web site that had malliculs content when I opened the app and each browser I download is pretty much a shot in the foot as trying to load a page with pictures and or something it shows damaged image symbols and here is the catch, the page loads on every other device. And do not get me started on chrome, i always have to stop the page from finishing up on loading a page inable to type this. The only device that is pretty much safe from this monstrosity called preferred activity setter is my Samsung Galaxy Tab 4. And I have some shocking news as well, it appears after the most recent update of "*Google Play Services*". None of my devices had it before
My Kyocera Event can't connect any more, not even to google play because of it
My 2 Kyocera ZTE AWE/N800 phones have it and it works fine there as force stopping it caused it to crash all together as AVG says it is not active per say as I'll be looking into this in more detail
My Moto G is excluded as well as my Samsung Galaxy Tab 4
But my Samsung Galaxy Prevail LTE has been taking the blunt of it so far and soon will be rooting it to forcibly remove it
In conclusion if you think it isn't doing anything and or harmless think again. I think preferred activity setter is a problem and should be dealt with promply