[CrOS Hotspot] Handling new idle reason errors

Shill added new idle reason errors, these changes should handle them and
report metrics appropriately.

Bug: b/332968557
Change-Id: I157853891de0ef908c0445920b889e658dd46c55
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/5448165


Commit-Queue: Nikhil Nayunigari <nikhilcn@google.com>
Reviewed-by: Jason Zhang <jiajunz@google.com>
Reviewed-by: Andre Le <leandre@chromium.org>
Reviewed-by: Chris Bookholt <bookholt@chromium.org>
Cr-Commit-Position: refs/heads/main@{#1286557}