Bug 1792253 - rename useragent manifest files. r=necko-reviewers,kershaw

Manifests for browser mochitests should be named accordingly.

Differential Revision: https://phabricator.services.mozilla.com/D158119

netwerk/test/moz.build

@@ -8,8 +8,8 @@ TEST_DIRS += ["httpserver", "gtest", "http3server"]
 
 BROWSER_CHROME_MANIFESTS += [
     "browser/browser.ini",
-    "useragent/nonsnap.ini",
-    "useragent/snap.ini",
+    "useragent/browser_nonsnap.ini",
+    "useragent/browser_snap.ini",
 ]
 MOCHITEST_MANIFESTS += ["mochitests/mochitest.ini"]