Bug 1598107 - Set inputHandling=true for the browser.urlbar.onResultPicked event r=mak,mixedpuppy

Differential Revision: https://phabricator.services.mozilla.com/D54025

--HG--
extra : moz-landing-system : lando

browser/components/extensions/parent/ext-urlbar.js

@@ -214,6 +214,7 @@ this.urlbar = class extends ExtensionAPI {
         onResultPicked: new EventManager({
           context,
           name: "urlbar.onResultPicked",
+          inputHandling: true,
           register: (fire, providerName) => {
             let provider = UrlbarProviderExtension.getOrCreate(providerName);
             provider.setEventListener("resultPicked", async resultPayload => {