[Signin][Android] Adjust AccountManagementFragment after removing sign-out pref

This CL adjusts the if branch in AccountManagementFragment after
removing sign-out allowed pref value.

Bug: 1162231
Change-Id: I463913e92c45de052c0272a478282fb3c2ad1932
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2624647Reviewed-by: Boris Sazonov <bsazonov@chromium.org>
Commit-Queue: Alice Wang <aliceywang@chromium.org>
Cr-Commit-Position: refs/heads/master@{#842923}

chrome/android/java/src/org/chromium/chrome/browser/sync/settings/AccountManagementFragment.java

@@ -204,9 +204,9 @@ public class AccountManagementFragment extends PreferenceFragmentCompat
             }
             signOutPreference.setTitle(getSignOutPreferenceText());
             signOutPreference.setOnPreferenceClickListener(preference -> {
-                if (!isVisible() || !isResumed()) return false;
-
-                if (mSignedInAccountName != null) {
+                if (!isVisible() || !isResumed() || mSignedInAccountName == null) {
+                    return false;
+                }
                 SigninMetricsUtils.logProfileAccountManagementMenu(
                         ProfileAccountManagementMetrics.TOGGLE_SIGNOUT, mGaiaServiceType);
 
@@ -225,9 +225,6 @@ public class AccountManagementFragment extends PreferenceFragmentCompat
                             .signOut(SignoutReason.USER_CLICKED_SIGNOUT_SETTINGS, null, false);
                 }
                 return true;
-                }
-
-                return false;
             });
         }
     }