CEC VTS: Add Utility to get device type, logical address and reboot

Add rebootDutAndRestartServices(), getDeviceTypes(),
getInitialLogicalAddresses() helper methods to
VtsHalTvCecV1_0HostCecClientTest.py file.

Bug: 157402557
Test: None
Change-Id: I1b46d504615bfdd425d47009dc06ff2e8d49805d
2 files changed