Fix crash when string isEmpty (#2189)

Author: keianhzo

app/src/common/shared/org/mozilla/vrbrowser/ui/widgets/settings/LanguageOptionsView.java

@@ -123,7 +123,9 @@ private int getLanguageIndex(@NonNull String text) {
     private SpannableStringBuilder getSpannedLanguageText(@NonNull String language) {
         int end = getLanguageIndex(language);
         SpannableStringBuilder spanned = new SpannableStringBuilder(language);
-        spanned.setSpan(new StyleSpan(Typeface.BOLD), 0, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+        if (end > 0) {
+            spanned.setSpan(new StyleSpan(Typeface.BOLD), 0, end, Spannable.SPAN_EXCLUSIVE_EXCLUSIVE);
+        }
         return spanned;
     }