[TTS] Restrict a flaky test to < P+

Restricts the TestTapALot test to < Android Pie and later.

BUG=1036414

Change-Id: Ida7f3cf38c6147a32b3a04ee6d57527a503a5a5a
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/1978837
Auto-Submit: Donn Denman <donnd@chromium.org>
Reviewed-by: Jinsuk Kim <jinsukkim@chromium.org>
Commit-Queue: Donn Denman <donnd@chromium.org>
Cr-Commit-Position: refs/heads/master@{#726971}

chrome/android/javatests/src/org/chromium/chrome/browser/contextualsearch/ContextualSearchManagerTest.java

@@ -2134,6 +2134,7 @@ public class ContextualSearchManagerTest {
     @Test
     @LargeTest
     @Feature({"ContextualSearch"})
+    @DisableIf.Build(sdk_is_greater_than = Build.VERSION_CODES.O_MR1, message = "crbug.com/1036414")
     public void testTapALot() throws InterruptedException, TimeoutException {
         for (int i = 0; i < 50; i++) {
             clickToTriggerPrefetch();