Populate EEP estimate in NQE

Call EEP on every network change, and populate the estimates
into the NQE observation buffer.

BUG=472685

Committed: https://crrev.com/9ee5d296239e3bc21b5c70259242ce6c4cefc96b
Cr-Commit-Position: refs/heads/master@{#349032}

Review URL: https://codereview.chromium.org/1316863006

Cr-Commit-Position: refs/heads/master@{#349232}
8 files changed