tree fc512f60506bd3ea1904fe79cb4ff0f88d8bc522
parent 38f7efba1c678d09676a34a70f65b49562e3dbb5
author Guang Zhu <guangzhu@google.com> 1384566433 -0800
committer Guang Zhu <guangzhu@google.com> 1384566433 -0800

expose waitForDeviceShell in ITestDevice

IDeviceStateMonitor already has an implementation, exposing it
in ITestDevice so that it can be used to wait for shell.

Use case:
Certain devices exposes normal adb mode while it's still in
recovery. This causes device to be online, but no `adb shell`
command can be executed (if it were in recovery mode, it won't
be considered "online").

Change-Id: I9a111e20e97464c36df18db5efea0b787647d006