Virtual Device known failures: Suppress entire harmony MulticastSocketTest.

Test methods other than the ones previously listed fail on cuttlefish.
The test contains several pieces of code that short-circuit the test
if the _device_ doesn't support multicast (no WiFi) but there's no
check for whether the _network_ does (CTS requires the network to
support multicast).

In order for the test to not fail on cuttlefish, this CL adds the entire
test class to the known failures expectations; this also covers any
methods that might be added to this test class in futurel.

Test: Checked that knownfailures.txt (the one for non-virtualdevice)
      contains references to test classes, not just to methods.
      Therefore I'm expecting that this syntax works, but I didn't
      take any further steps to verify this.
Bug: 151612773
Change-Id: Ie5554b87fdf9727fcced16a5ee7df96574b5374e
Merged-In: Ie5554b87fdf9727fcced16a5ee7df96574b5374e
(cherry picked from commit 719cf9c5b858fcc7b54ae41d519bc23379bb41e4)

0 files changed, 0 insertions, 0 deletions