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This injects SecureChannelClient and local device into RemoteDeviceLifeCycle,
both of which are used to make a call to SecureChannel service. If the
chromeos::features::kMultiDeviceApi flag is enabled, they are used to create
an authenticated BLE connection to the remote device, instead of
using BluetoothLowEnergyConnectionFinder.

This change also injects a real ClientChannel into ProximityAuthMonitor.

R=jhawkins@chromium.org, khorimoto@chromium.org

Bug: 824568, 752273
Change-Id: Iefb03d1356ea7e8f5aac0136c8d7a4280302da16
Reviewed-on: https://chromium-review.googlesource.com/1107490
Commit-Queue: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: James Hawkins <jhawkins@chromium.org>
Reviewed-by: Kyle Horimoto <khorimoto@chromium.org>
Cr-Commit-Position: refs/heads/master@{#569825}