Add a flaky test into known-failures.

Change-Id: Ie8375b9de0973eab075091922a7d3ee226fee258
diff --git a/tools/cts-tradefed/res/config/cts-known-failures.xml b/tools/cts-tradefed/res/config/cts-known-failures.xml
index 98b9c62..b95f243 100644
--- a/tools/cts-tradefed/res/config/cts-known-failures.xml
+++ b/tools/cts-tradefed/res/config/cts-known-failures.xml
@@ -207,6 +207,8 @@
     <!-- b/62924649 -->
     <option name="compatibility:exclude-filter" value="CtsPreference2TestCases android.preference2.cts.PreferenceActivityLegacyFlowTest#legacyActivityMultiWindowTest" />
     <option name="compatibility:exclude-filter" value="CtsPreference2TestCases android.preference2.cts.PreferenceActivityLegacyFlowTest#legacyActivityMultiWindowToggleTest" />
+    <!-- b/67738829 -->
+    <option name="compatibility:exclude-filter" value="CtsPreference2TestCases android.preference2.cts.PreferenceActivityLegacyFlowTest#legacyActivityRecreateTest" />
 
     <!-- b/38224690 -->
     <option name="compatibility:exclude-filter" value="CtsMediaTestCases android.media.cts.NativeEncoderTest" />