Adds some IME team owners on IME mojo service.

This flag is used by enabling an experimental IME Mojo service to
replace the existing IME framework, the project might last for a few
quarters until we are confident to get rid of old system.

Before that, we want to keep the fallback possibility for users

Change-Id: I010a8d3b21c7ff9e7a8a706bf604a1e501518717
Reviewed-on: https://chromium-review.googlesource.com/c/1345789Reviewed-by: Elly Fong-Jones <ellyjones@chromium.org>
Commit-Queue: Leo Zhang <googleo@chromium.org>
Cr-Commit-Position: refs/heads/master@{#612509}

chrome/browser/flag-metadata.json

@@ -1000,7 +1000,7 @@
   },
   {
     "name": "enable-cros-ime-service",
-    // "owners": [ "your-team" ],
+    "owners": [ "essential-inputs-team@google.com" ],
     "expiry_milestone": 76
   },
   {