Merge from Widevine repo of http://go/wvgerrit/24042 This CL adjusts the tolerance in tests that check the license_received time. This was periodically failing because a nonce flood might delay the test by 1 second, which was being rounded up to 2. The tolerance is now 3. The time is explicily used when it is available. Some extra logging is also added to the mock. bug:31458046 Change-Id: I450880cb3cd8bd5ef66cba13b94dd963d2663d9a