Mark AwMetricsIntegrationTest#testMetadata_hardwareScreen as flaky.

Bug: 1096670

TBR=ntfschr@chromium.org

Change-Id: Id46aea904a83e918c0a819d604f24db4654723f1
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2251782Reviewed-by: calamity <calamity@chromium.org>
Commit-Queue: calamity <calamity@chromium.org>
Cr-Commit-Position: refs/heads/master@{#780202}

android_webview/javatests/src/org/chromium/android_webview/test/AwMetricsIntegrationTest.java

@@ -20,6 +20,7 @@ import org.chromium.base.Callback;
 import org.chromium.base.ThreadUtils;
 import org.chromium.base.metrics.RecordHistogram;
 import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.components.metrics.ChromeUserMetricsExtensionProtos.ChromeUserMetricsExtension;
 import org.chromium.components.metrics.MetricsSwitches;
@@ -190,6 +191,7 @@ public class AwMetricsIntegrationTest {
     @Test
     @MediumTest
     @Feature({"AndroidWebView"})
+    @DisabledTest(message = "crbug.com/1096670")
     public void testMetadata_hardwareScreen() throws Throwable {
         ChromeUserMetricsExtension log = mPlatformServiceBridge.waitForNextMetricsLog();
         SystemProfileProto systemProfile = log.getSystemProfile();