Fix NPE when web activity can not be resolved for default browser promo

PackageManagerUtils##resolveDefaultWebBrowserActivity can return null.
Add one more check to prevent NPE.

Bug: 1131772
Change-Id: I93cd791b00c675d2d797fdcde76ca5fedd0a50a5
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2427138Reviewed-by: Pavel Yatsuk <pavely@chromium.org>
Reviewed-by: Theresa  <twellington@chromium.org>
Commit-Queue: Lijin Shen <lazzzis@google.com>
Cr-Commit-Position: refs/heads/master@{#810265}

chrome/browser/ui/android/default_browser_promo/java/src/org/chromium/chrome/browser/ui/default_browser_promo/DefaultBrowserPromoDeps.java

@@ -16,8 +16,6 @@ import android.os.Build;
 import android.provider.Settings;
 import android.text.TextUtils;
 
-import androidx.annotation.NonNull;
-
 import org.chromium.base.CommandLine;
 import org.chromium.base.ContextUtils;
 import org.chromium.base.PackageManagerUtils;
@@ -125,8 +123,8 @@ public class DefaultBrowserPromoDeps {
     }
 
     @DefaultBrowserState
-    int getCurrentDefaultBrowserState(@NonNull ResolveInfo info) {
-        if (info.match == 0) return DefaultBrowserState.NO_DEFAULT; // no default
+    int getCurrentDefaultBrowserState(ResolveInfo info) {
+        if (info == null || info.match == 0) return DefaultBrowserState.NO_DEFAULT; // no default
         if (TextUtils.equals(ContextUtils.getApplicationContext().getPackageName(),
                     info.activityInfo.packageName)) {
             return DefaultBrowserState.CHROME_DEFAULT; // Already default