Extend terminal-system-app[-splits] flags to M85

Change-Id: Iafa88f696ee5a5b7c51cf7a65a9f210c8e2ea4aa
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2065568
Auto-Submit: Joel Hockey <joelhockey@chromium.org>
Reviewed-by: Jason Lin <lxj@google.com>
Commit-Queue: Joel Hockey <joelhockey@chromium.org>
Cr-Commit-Position: refs/heads/master@{#742873}

chrome/browser/flag-metadata.json

@@ -3528,12 +3528,12 @@
   {
     "name": "terminal-system-app",
     "owners": [ "joelhockey", "benwells", "//chrome/browser/chromeos/guest_os/OWNERS" ],
-    "expiry_milestone": 82
+    "expiry_milestone": 85
   },
   {
     "name": "terminal-system-app-splits",
     "owners": [ "joelhockey", "benwells", "//chrome/browser/chromeos/guest_os/OWNERS" ],
-    "expiry_milestone": 82
+    "expiry_milestone": 85
   },
   {
     "name": "tint-gl-composited-content",