Added issue detector for incorrect unmetered flag

The non-NR devices are not supposed to see TEMPORARILY_NOT_METERED
capability, which should only be set on 5G networks.

Bug: 176119724
Test: Manual
Change-Id: I8b1dc41ee93fdb597c84172d9f55cb188f3fd3e4
Merged-In: I8b1dc41ee93fdb597c84172d9f55cb188f3fd3e4