Disable flaky test testSingleSite[Sound|Clear]PopupLaunches

The two tests have been flaky according to FindIt. Please see linked bug for details.

TBR=andypaicu@chromium.org
Bug: 1150676

Change-Id: I5812ca6afa0e04449396a3caa1bd1138aadd421c
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2557908Reviewed-by: Yi Gu <yigu@chromium.org>
Commit-Queue: Yi Gu <yigu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#830563}

weblayer/browser/android/javatests/src/org/chromium/weblayer/test/SiteSettingsTest.java

@@ -79,6 +79,7 @@ public class SiteSettingsTest {
     @Test
     @SmallTest
     @MinWebLayerVersion(84)
+    @DisabledTest(message = "TODO(crbug.com/1150676): Fix flakiness.")
     public void testSingleSiteSoundPopupLaunches() throws InterruptedException {
         mSiteSettingsTestRule.launchSingleSiteSettingsWithProfile(PROFILE_NAME, GOOGLE_URL);
 
@@ -90,6 +91,7 @@ public class SiteSettingsTest {
     @Test
     @SmallTest
     @MinWebLayerVersion(84)
+    @DisabledTest(message = "TODO(crbug.com/1150676): Fix flakiness.")
     public void testSingleSiteClearPopupLaunches() throws InterruptedException {
         mSiteSettingsTestRule.launchSingleSiteSettingsWithProfile(PROFILE_NAME, GOOGLE_URL);