Ignore null value in Account settings summary.

If an account type has no valid label, null is returned. Check the value
to make sure that it is a valid label before adding it to the summary.

Change-Id: I0cf3ef9a976e1a7fe16720da237f416c674791fc
Fixes: 73375480
Test: make RunSettingsRoboTests

src/com/android/settings/accounts/AccountDashboardFragment.java

@@ -22,6 +22,7 @@ import android.content.Context;
 import android.os.UserHandle;
 import android.provider.SearchIndexableResource;
 import android.text.BidiFormatter;
+import android.text.TextUtils;
 
 import com.android.internal.logging.nano.MetricsProto.MetricsEvent;
 import com.android.settings.R;
@@ -94,17 +95,21 @@ public class AccountDashboardFragment extends DashboardFragment {
                 if (types == null || types.length == 0) {
                     summary = mContext.getString(R.string.account_dashboard_default_summary);
                 } else {
-                    // Show up to 3 account types
-                    final int size = Math.min(3, types.length);
+                    // Show up to 3 account types, ignore any null value
+                    int accountToAdd = Math.min(3, types.length);
 
-                    for (int i = 0; i < size; i++) {
+                    for (int i = 0; i < types.length && accountToAdd > 0; i++) {
                         final CharSequence label = authHelper.getLabelForType(mContext, types[i]);
+                        if (TextUtils.isEmpty(label)) {
+                            continue;
+                        }
                         if (summary == null) {
                             summary = bidiFormatter.unicodeWrap(label);
                         } else {
                             summary = mContext.getString(R.string.join_many_items_middle, summary,
                                     bidiFormatter.unicodeWrap(label));
                         }
+                        accountToAdd--;
                     }
                 }
                 mSummaryLoader.setSummary(this, summary);