This app was mentioned in 1 comment, with an average of 1.00 upvote
https://play.google.com/store/apps/details?id=kz.galan.antispy&hl=en
Doesn't require Root and is just as good as any of them.
I also recommend these apps to go along with the one above for a more complete protection system.
https://play.google.com/store/apps/details?id=com.koebenapps.wiretapdetection&hl=en
https://play.google.com/store/apps/details?id=com.skibapps.blockmicrophone&hl=en
https://play.google.com/store/apps/details?id=com.sjaellsoft.antispyforparanoids&hl=en
https://play.google.com/store/apps/details?id=com.sjaellsoft.avoidbeingspiedon&hl=en
Pick your state you live in version of this video app that sends what is recorded to another site in real so it cannot be deleted by LE and is made by the ACLU.
https://play.google.com/store/apps/details?id=org.aclu.mobile.justice.ca&hl=en