[Fuchsia] Filter tests broken by getsockname().

Temporarily filter some tests which fail due to broken getsockname()
semantics on connect()ed UDP sockets.

Bug: 989223
Change-Id: I5ddd5783d33ce84999cced12f273d3680f56fae1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1730653
Auto-Submit: Wez <wez@chromium.org>
Commit-Queue: Kevin Marshall <kmarshall@chromium.org>
Reviewed-by: Kevin Marshall <kmarshall@chromium.org>
Cr-Commit-Position: refs/heads/master@{#683366}

testing/buildbot/filters/fuchsia.services_unittests.filter

@@ -29,3 +29,8 @@
 
 # https://crbug.com/986544 - Flakes with mismatched state expectations.
 -URLLoaderTest.ResourceSchedulerIntegration
+
+# https://crbug.com/989223 - connect()ed UDP socket's getsockname() is wrong.
+-UDPSocketTest.TestReceiveMoreWithBufferSize
+-UDPSocketTest.TestReadSend
+-NetworkContextTest.CreateUDPSocket