Europol has started a new campaign to promote security tools on mobile phones. BTW, I have got no idea why the font-size is so ridiculous small on the page. https://www.europol.europa.eu/content/mobile-malware
Also android has an antivirus built in with google play , that is scanning your device for harmful applications , see - settings - google - security - verify apps
But it isnt activated by default, it needs to be turned on (it will need to download some files too). Google Bouncer is more than enough imo, unless you are a pirate.