Add session config param for max time on non-default network.

Bug: 791884
Cq-Include-Trybots: master.tryserver.chromium.android:android_cronet_tester;master.tryserver.chromium.mac:ios-simulator-cronet
Change-Id: Iaa1ccb566116b80d902f0ccd893d3dac08d3258c
Reviewed-on: https://chromium-review.googlesource.com/818190
Reviewed-by: Misha Efimov <[email protected]>
Reviewed-by: Ryan Hamilton <[email protected]>
Commit-Queue: Zhongyi Shi <[email protected]>
Cr-Commit-Position: refs/heads/master@{#523834}
18 files changed