[Nearby] Disable flaky ConditionVariable test.

Bug: 1129023
Change-Id: Icae4a8c1de05954f7467edae7c477ec41f4fa183
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2438037
Auto-Submit: Ryan Hansberry <hansberry@chromium.org>
Reviewed-by: James Vecore <vecore@google.com>
Commit-Queue: James Vecore <vecore@google.com>
Cr-Commit-Position: refs/heads/master@{#811888}

chrome/services/sharing/nearby/platform_v2/condition_variable_unittest.cc

@@ -87,7 +87,7 @@ TEST_F(ConditionVariableTest, SingleSequence_BlocksOnWaitAndUnblocksOnNotify) {
 }
 
 TEST_F(ConditionVariableTest,
-       MultipleSequences_BlocksOnWaitAndUnblocksOnNotify) {
+       DISABLED_MultipleSequences_BlocksOnWaitAndUnblocksOnNotify) {
   base::RunLoop run_loop_1;
   base::UnguessableToken attempt_id_1 = base::UnguessableToken::Create();
   WaitOnConditionVariableFromParallelSequence(run_loop_1, attempt_id_1);