Include a name in the waitFor invocations for logging

Without a name, waitFor invocations appear as:
    ***Waiting for ... retry=5 elapsed=3524 ms
    Requesting new device state dump
    ***Waiting for ... Failed!

Which makes it hard to debug

Bug: 167521849
Test: atest FlickerLibTest
Change-Id: Id04a33a51987043651ae982a3007681a72e0b382