It's hard to correlate test failures with the tests that
were running when looking in the logcat. This change adds
the current test name in the log for each test to make it
more clear.
Merge of go/wvgerrit/#/c/13847/ from the widevine cdm repo
b/19822500
Change-Id: Idd37a22f7063d9d686d3ead567954b86fb0fa70f
