[feedback] Add UserRequestDeviceStuck reboot reason

Adds UserRequestDeviceStuck as an event_code for the
last_reboot_uptime_migrated metric.

Bug: 477312074
Change-Id: If2ede077979ceaa68862b153508087917aecc96d
Reviewed-on: https://fuchsia-review.googlesource.com/c/cobalt-registry/+/1479794
Commit-Queue: Thomas Gales <tgales@google.com>
Privacy-Approval: Alex Pankhurst <pankhurst@google.com>
Reviewed-by: Alex Pankhurst <pankhurst@google.com>

fuchsia/feedback/metrics.yaml

diff --git a/fuchsia/feedback/metrics.yaml b/fuchsia/feedback/metrics.yaml
index 52a4f22..a1c5c41 100644
--- a/fuchsia/feedback/metrics.yaml
+++ b/fuchsia/feedback/metrics.yaml
@@ -217,6 +217,7 @@
         24: AndroidCriticalProcessFailure
         25: AndroidRescueParty
         26: AndroidNoReason
+        27: UserRequestDeviceStuck
   reports:
       #####################################################################
       # histogram