Updated expiry of background tracing flags

R=ssid@chromium.org

Change-Id: I83081fc50722f30217ce10f689f197372dc6e636
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2065408
Commit-Queue: ssid <ssid@chromium.org>
Reviewed-by: ssid <ssid@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743210}

chrome/browser/flag-metadata.json

@@ -1587,8 +1587,8 @@
   },
   {
     "name": "enable-navigation-tracing",
-    "owners": [ "tracing" ],
-    "expiry_milestone": 80
+    "owners": [ "oysteine" ],
+    "expiry_milestone": 85
   },
   {
     "name": "enable-network-logging-to-file",
@@ -3573,8 +3573,8 @@
   },
   {
     "name": "trace-upload-url",
-    "owners": [ "tracing" ],
-    "expiry_milestone": 80
+    "owners": [ "oysteine" ],
+    "expiry_milestone": 85
   },
   {
     "name": "translate-android-manual-trigger",