Bug 1550895 - Bump android gv wpt back up to tier-3

Bug 1553584 was filed and shows a race condition in the test harness that could make fixing bugs difficult. Bumping these back to tier-3 until that can be fixed.

Differential Revision: https://phabricator.services.mozilla.com/D32240

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

taskcluster/ci/test/web-platform.yml

@@ -64,6 +64,7 @@ web-platform-tests:
             default: built-projects
     tier:
         by-test-platform:
+            android-em-7.0-x86_64/*: 3
             android.*: 2
             linux64-asan/opt: 2
             windows10-aarch64.*: 2
@@ -121,6 +122,7 @@ web-platform-tests-reftests:
             default: built-projects
     tier:
         by-test-platform:
+            android-em-7.0-x86_64/*: 3
             android.*: 2
             linux64-asan/opt: 2
             windows10-aarch64.*: 2
@@ -170,7 +172,7 @@ web-platform-tests-wdspec:
             default: built-projects
     tier:
         by-test-platform:
-            android.*: 2
+            android.*: 3
             linux64-asan/opt: 2
             .*-qr/.*: 2  # can't be tier-1 if it's not running on integration branches
             default: default