CEC VTS: Store Initial Logical Addresses

Add a global variable to get initial logical addresses and use that
variable in the tests required.

Bug: 157402557
Test: vts-tradefed run commandAndExit vts-hal-tv -m VtsHalTvCecV1_0HostCecClient
Change-Id: I32d613bf2339d4e572a4329131a6802554c37922
1 file changed