QNS anomaly report only track frequent HO

Refine the anomaly detection only to track HO between IWLAN and WWAN,
as we allow frequent change within WWAN due to data_registration state
changes, which triggers false positive.

Fix: 234704405
Test: manual basic
Merged-In: I0c332cca3263cd1cf94feab03e67db2c2f2ba9a0
Change-Id: I0c332cca3263cd1cf94feab03e67db2c2f2ba9a0