Android: disable testStopAndStartSyncThroughAndroidMasterSync

No change to logic. This disables a flaky test.

Tbr: mastiz@chromium.org
Bug: 1103515
Test: None
Change-Id: I807fb635cf761a75013f5bde622df32909009f18
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2357469Reviewed-by: Nate Fischer <ntfschr@chromium.org>
Commit-Queue: Nate Fischer <ntfschr@chromium.org>
Cr-Commit-Position: refs/heads/master@{#798258}

chrome/android/javatests/src/org/chromium/chrome/browser/sync/SyncTest.java

@@ -159,6 +159,7 @@ public class SyncTest {
     @LargeTest
     @Features.DisableFeatures(ChromeFeatureList.DECOUPLE_SYNC_FROM_ANDROID_MASTER_SYNC)
     @Feature({"Sync"})
+    @DisabledTest(message = "crbug.com/1103515")
     public void testStopAndStartSyncThroughAndroidMasterSync() {
         mSyncTestRule.setUpAccountAndSignInForTesting();