Mark test as flaky to unblock presubmits.

Test: m
Bug: 299483542
Change-Id: If03fba214ca6536063a0e13eff3bbdba2067bfc2
diff --git a/core/tests/coretests/src/android/provider/DeviceConfigTest.java b/core/tests/coretests/src/android/provider/DeviceConfigTest.java
index 5b3be58..14ecfc5 100644
--- a/core/tests/coretests/src/android/provider/DeviceConfigTest.java
+++ b/core/tests/coretests/src/android/provider/DeviceConfigTest.java
@@ -28,6 +28,7 @@
 import android.platform.test.annotations.Presubmit;
 
 import androidx.test.InstrumentationRegistry;
+import androidx.test.filters.FlakyTest;
 import androidx.test.filters.SmallTest;
 import androidx.test.runner.AndroidJUnit4;
 
@@ -734,6 +735,7 @@
     }
 
     @Test
+    @FlakyTest(bugId = 299483542)
     public void onPropertiesChangedListener_setPropertiesCallback() {
         final CountDownLatch countDownLatch = new CountDownLatch(1);
         DeviceConfig.setProperty(NAMESPACE, KEY, VALUE, false);