Add PrivappPermissionsTest to known failures

CDD does not require that the whitelist must be an exact match with what
the apps are requesting.

Test: make cts
Bug: 64690009
Bug: 36730743
Change-Id: I3df04557baa461fb7092f866d2dd967acafdbeca
diff --git a/tools/cts-tradefed/res/config/cts-known-failures.xml b/tools/cts-tradefed/res/config/cts-known-failures.xml
index d4cd481..2ecc0c8 100644
--- a/tools/cts-tradefed/res/config/cts-known-failures.xml
+++ b/tools/cts-tradefed/res/config/cts-known-failures.xml
@@ -264,4 +264,6 @@
     <option name="compatibility:exclude-filter" value="CtsSensorTestCases android.hardware.cts.SensorDirectReportTest#testRegisterMultipleChannels" />
     <option name="compatibility:exclude-filter" value="CtsSensorTestCases android.hardware.cts.SensorDirectReportTest#testReconfigure" />
 
+    <!-- b/64690009 -->
+    <option name="compatibility:exclude-filter" value="CtsPermission2TestCases android.permission2.cts.PrivappPermissionsTest" />
 </configuration>