Disable failing DecoderServiceHostTest#testCancelation.

See e.g.
https://test-results.appspot.com/dashboards/flakiness_dashboard.html#testType=chrome_public_test_apk&tests=org.chromium.chrome.browser.photo_picker.DecoderServiceHostTest%23testCancelation

Change-Id: I8c6398d741ee64148701cdde4459d78998f4ae60
Tbr: finnur@chromium.org
Bug: 1054652
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2067739Reviewed-by: Justin DeWitt <dewittj@chromium.org>
Commit-Queue: Justin DeWitt <dewittj@chromium.org>
Cr-Commit-Position: refs/heads/master@{#743379}

chrome/android/javatests/src/org/chromium/chrome/browser/photo_picker/DecoderServiceHostTest.java

@@ -18,6 +18,7 @@ import org.junit.runner.RunWith;
 
 import org.chromium.base.test.util.CallbackHelper;
 import org.chromium.base.test.util.CommandLineFlags;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.MinAndroidSdkLevel;
 import org.chromium.base.test.util.UrlUtils;
 import org.chromium.chrome.browser.ChromeActivity;
@@ -247,6 +248,7 @@ public class DecoderServiceHostTest implements DecoderServiceHost.ServiceReadyCa
 
     @Test
     @LargeTest
+    @DisabledTest
     public void testCancelation() throws Throwable {
         DecoderServiceHost host = new DecoderServiceHost(this, mContext);
         host.bind(mContext);