feat(extra-info): add more ItemMetadata states

This CL also adds logic to show the state codename if the localized
friendly name is not available. This is needed because we don't know
what the AUTOMATED_ABUSE_MANUAL_REVIEW state corresponds to, so we can't
have a friendly name and would like to display the codename instead.

Change-Id: I0b9676b4403c6f531ec270aab22ecd512101bcea
diff --git a/src/static/_locales/en/messages.json b/src/static/_locales/en/messages.json
index ee327ca..27f893a 100644
--- a/src/static/_locales/en/messages.json
+++ b/src/static/_locales/en/messages.json
@@ -529,6 +529,14 @@
     "message": "Expert flagged (pending manual review)",
     "description": "Thread/message state EXPERT_FLAGGED_PENDING_MANUAL_REVIEW (a PE flagged the message and needs manual review)."
   },
+  "inject_extrainfo_message_state_awaiting_classification": {
+    "message": "Awaiting classification",
+    "description": "Thread/message state AWAITING_CLASSIFICATION."
+  },
+  "inject_extrainfo_message_state_generated_answer_adopted": {
+    "message": "Generated answer adopted",
+    "description": "Thread/message state GENERATED_ANSWER_ADOPTED."
+  },
   "inject_extrainfo_message_state_manual_take_down_hide2": {
     "message": "Hidden manually",
     "description": "Thread/message state MANUAL_TAKE_DOWN_HIDE (the message has been manually hidden by a Googler)."