Add an option to disable searchbar in recents [1/2]

Liquid Edit: Used switch prefence instead of checkbox and edited the summary string a tiny bit

Credit: yashade2001

Change-Id: Ifff2ced1ac2a93211b5c22c9f22fa0a44a5d2f04
Merge "Add an option to disable searchbar in recents [1/2]" into lollipop