Explicitly exclude @Ignore annotation

Some flicker class are marked Ignored causing some issue
with the AJUR runner. To avoid them, simply filter it.

Test: None
Bug: 129468528
Change-Id: I6442204eb6f89b4bf90a39ee821ebc4daebbe120
diff --git a/tests/FlickerTests/AndroidTest.xml b/tests/FlickerTests/AndroidTest.xml
index 41cb74a..e36f976 100644
--- a/tests/FlickerTests/AndroidTest.xml
+++ b/tests/FlickerTests/AndroidTest.xml
@@ -17,6 +17,7 @@
     </target_preparer>
     <test class="com.android.tradefed.testtype.AndroidJUnitTest">
         <option name="package" value="com.android.server.wm.flicker"/>
+        <option name="exclude-annotation" value="org.junit.Ignore" />
         <option name="shell-timeout" value="6600s" />
         <option name="test-timeout" value="6000s" />
         <option name="hidden-api-checks" value="false" />