[Android] Extend enable-inline-update-flow flag

It is necessary to continue the inline update flow experiment a little
bit longer, so this sets the expiry date to M83 for now.

R=dtrainor@chromium.org

Bug: None
Change-Id: Iacfb313619defdbdfa3b5042d93dfdc3da50494c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2007316Reviewed-by: David Trainor <dtrainor@chromium.org>
Commit-Queue: Tommy Nyquist <nyquist@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743861}

chrome/browser/flag-metadata.json

@@ -1493,7 +1493,7 @@
   {
     "name": "enable-inline-update-flow",
     "owners": [ "nyquist", "dtrainor" ],
-    "expiry_milestone": 80
+    "expiry_milestone": 83
   },
   {
     "name": "enable-intent-picker",