Disable failing test: ExperimentalOptionsTest#testSetSSLKeyLogFile

Failing on android-cronet-kitkat-arm-rel bot.

BUG=1021941
TBR=pnoland@chromium.org
NOTRY=true

Change-Id: I7a265a1fa94111cd05634e99aae8fcd52e832f14
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1901288
Commit-Queue: Tim Volodine <timvolodine@chromium.org>
Reviewed-by: Tim Volodine <timvolodine@chromium.org>
Cr-Commit-Position: refs/heads/master@{#713012}

components/cronet/android/test/javatests/src/org/chromium/net/ExperimentalOptionsTest.java

@@ -27,6 +27,7 @@ import org.junit.runner.RunWith;
 import org.chromium.base.Log;
 import org.chromium.base.PathUtils;
 import org.chromium.base.annotations.JNINamespace;
+import org.chromium.base.test.util.DisabledTest;
 import org.chromium.base.test.util.Feature;
 import org.chromium.net.CronetTestRule.OnlyRunNativeCronet;
 import org.chromium.net.impl.CronetUrlRequestContext;
@@ -95,6 +96,7 @@ public class ExperimentalOptionsTest {
         cronetEngine.shutdown();
     }
 
+    @DisabledTest(message = "crbug.com/1021941")
     @Test
     @MediumTest
     @Feature({"Cronet"})