commit 126171b2ccf938934a14fcd992dbff0919da7b53
author Erik Kline <ek@google.com> Tue Oct 10 11:54:08 2017 +0900
committer Erik Kline <ek@google.com> Wed Oct 11 11:37:45 2017 +0900
tree 4c64aaf0fcab421559cd0335454654f91774bacd
parent 7d1789867b989ebcc17c8e1ba2fcf6d0824c5148

Log upstream network suspend/resume callbacks

Also log signal strength while we're at it:

    2017-10-10T14:05:00.968 - [UpstreamNetworkMonitor] preferred upstream type: WIFI
    2017-10-10T14:06:07.654 - [UpstreamNetworkMonitor] upstream network signal strength: -62 -> -67
    2017-10-10T14:06:13.704 - [UpstreamNetworkMonitor] upstream network signal strength: -67 -> -64

Test: as follows
    - built
    - flashed
    - booted
    - runtest frameworks-net passes
Bug: 29337859
Bug: 32163131
Bug: 64976634
Bug: 67396342

Merged-In: I9121798bba0be9dcdf1e45d39c092020620fa53b
Merged-In: I1d3420380691efd886315275598134b98f4041ed
Change-Id: Id6e143edc9f5b0256aa637643680f6c8dce70d90
(cherry picked from commit 60caf7d29132262dd4a077b68daa807d22773524)