[iOS] Disable Flaky Smoke Test

SmokeTestCase/testAppLaunchManagerBackgroundAndForegroundApp is flaky on
simulators.

crbug.com/1164446

Bug: 1164446
Change-Id: I4b6db5a9d497a0341a43ebc6b14551e6d7f076ea
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2617581
Commit-Queue: Sebastien Lalancette <seblalancette@chromium.org>
Reviewed-by: Eugene But <eugenebut@chromium.org>
Auto-Submit: Sebastien Lalancette <seblalancette@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842063}

ios/chrome/test/earl_grey2/smoke_egtest.mm

@@ -5,6 +5,7 @@
 #import <TestLib/EarlGreyImpl/EarlGrey.h>
 #import <UIKit/UIKit.h>
 
+#import "base/ios/ios_util.h"
 #include "ios/chrome/browser/pref_names.h"
 #import "ios/chrome/browser/ui/settings/password/passwords_table_view_constants.h"
 #import "ios/chrome/browser/ui/ui_feature_flags.h"
@@ -291,7 +292,19 @@
 }
 
 // Tests backgrounding app and moving app back through AppLaunchManager.
-- (void)testAppLaunchManagerBackgroundAndForegroundApp {
+// TODO:(crbug.com/1164446): Re-enable this test on simulators.
+#if TARGET_OS_SIMULATOR
+#define MAYBE_testAppLaunchManagerBackgroundAndForegroundApp \
+  FLAKY_testAppLaunchManagerBackgroundAndForegroundApp
+#else
+#define MAYBE_testAppLaunchManagerBackgroundAndForegroundApp \
+  testAppLaunchManagerBackgroundAndForegroundApp
+#endif
+- (void)FLAKY_testAppLaunchManagerBackgroundAndForegroundApp {
+  if (!base::ios::IsRunningOnOrLater(13, 0, 0)) {
+    EARL_GREY_TEST_DISABLED(@"Test disabled on iOS 12 and lower.");
+  }
+
   [ChromeEarlGrey openNewTab];
   [[AppLaunchManager sharedManager] backgroundAndForegroundApp];
   [ChromeEarlGrey waitForMainTabCount:2];