https://chromium-review.googlesource.com/c/chromium/src/+/1115360/ removed histograms around how frequently network connection type changes. This makes it difficult to debug some of the issues around Network Quality Estimator as well as Network Change Notifier.

We should record metrics on how frequently network connection type change events were fired, how long the device stayed on a single connection type, how many requests were dispatched on a single connection type.