Roll DevTools to 2.12.2

Change-Id: I019c648c75e2c16567fbf2ddbd5961a5e2b2541b
Reviewed-on: https://dart-review.googlesource.com/c/sdk/+/240421
Reviewed-by: Ben Konyi <[email protected]>
Commit-Queue: Kenzie Davisson <[email protected]>

Author: kenzieschmoll

DEPS

@@ -110,7 +110,7 @@ vars = {
   "dart_style_rev": "d7b73536a8079331c888b7da539b80e6825270ea",
 
   "dartdoc_rev" : "334072b0cad436c05f6bcecf8a1a59f2f0809b84",
-  "devtools_rev" : "2a707ca56c1a9d5eeef212c28c573548a051fdd2",
+  "devtools_rev" : "8c525828ba33029ed664bf8ea2829b6e5370535f",
   "ffi_rev": "4dd32429880a57b64edaf54c9d5af8a9fa9a4ffb",
   "fixnum_rev": "848341f061359ef7ddc0cad472c2ecbb036b28ac",
   "file_rev": "1ebc38852ffed24b564910317982298b56c2cedd",