Fix a NPE in TabGroupUtils

This CL is gated by Finch parameter "enable_launch_polish" under flag
"enable-tab-grid-layout", with gate function
TabUiFeatureUtilities#isLaunchPolishEnabled.

Bug: 1133908
Change-Id: I90d4576a460303da137bb50ed53552c724628872
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2441934Reviewed-by: Wei-Yin Chen (陳威尹) <wychen@chromium.org>
Commit-Queue: Yue Zhang <yuezhanggg@chromium.org>
Cr-Commit-Position: refs/heads/master@{#812526}

chrome/android/features/tab_ui/java/src/org/chromium/chrome/browser/tasks/tab_groups/TabGroupUtils.java

@@ -50,6 +50,9 @@ public class TabGroupUtils {
                                 FeatureConstants.TAB_GROUPS_TAP_TO_SEE_ANOTHER_TAB_FEATURE))) {
             return;
         }
+        if (TabUiFeatureUtilities.isLaunchPolishEnabled() && view == null) {
+            return;
+        }
 
         @StringRes
         int textId;