Merge "Add new shell commands for DeviceStateChanged CTS test" into sc-v2-dev am: 4c80c3bda3 am: 6a0e389140

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/base/+/15325771

Change-Id: If16e8c862eb9eb725044ab96b66c32dd431d05f3