🏗Update code coverage status configuration for amphtml (#27843)

.codecov.yml

@@ -1,13 +1,38 @@
-comment: off
+# Overall settings for PR integration via codecov.io
+# See https://docs.codecov.io/docs/codecovyml-reference
+codecov:
+  bot: 'amp-coverage-bot'
+  ci:
+    - 'travis.org'
+  max_report_age: 24
+  require_ci_to_pass: yes
+  notify:
+    wait_for_ci: yes
+
+# Pull request comments disabled because they were too noisy
+# See https://docs.codecov.io/docs/pull-request-comments
+comment: false
+
+# Separate PR statuses for project-level and patch-level coverage
+# See https://docs.codecov.io/docs/commit-status
 coverage:
+  precision: 2
+  round: down
+  range: '80...100'
   status:
     project:
       default:
         base: auto
-        target: auto
-        threshold: 100
+        if_not_found: success
+        informational: true # TODO(rsimha): Remove this line after testing
+        only_pulls: true
+        target: 80%
+        threshold: 10%
     patch:
       default:
         base: auto
-        target: 100
-        threshold: 100
+        informational: true # TODO(rsimha): Remove this line after testing
+        if_not_found: success
+        only_pulls: true
+        target: 80%
+        threshold: 10%