Bug 1555158 - Part 1: Point `mach browsertime --setup` at mozilla/browsertime github repository. r=dpalmeiro

Key features in this commit:

- support for `contentfulSpeedIndex` visual metric
- support for the Gecko Window Recorder (Desktop only)
- support for the Gecko Profiler (Desktop only)
- partial support for GeckoView on Android

Differential Revision: https://phabricator.services.mozilla.com/D32907

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

tools/browsertime/package.json

@@ -5,7 +5,7 @@
   "license": "MPL-2.0",
   "dependencies": {},
   "devDependencies": {
-    "browsertime": "https://github.com/ncalexan/browsertime/tarball/4f8738e2225b3298556308c0d8c916d3b22e9741"
+    "browsertime": "https://github.com/mozilla/browsertime/tarball/e09ad6e8c4754bdd8688b569d9ea1482933a06dd"
   },
   "notes(private)": "We don't want to publish to npm, so this is marked as private",
   "private": true