Fixed typo on TextValueSanitizer sample.

Test: is an overkill here
Fixes: 78641592

Change-Id: I968d55830dfe9551eb4d1e1c8cd79651d674f8eb

core/java/android/service/autofill/TextValueSanitizer.java

@@ -37,7 +37,7 @@ import java.util.regex.Pattern;
  * <p>For example, to remove spaces from groups of 4-digits in a credit card:
  *
  * <pre class="prettyprint">
- * new TextValueSanitizer(Pattern.compile("^(\\d{4})\\s?(\\d{4})\\s?(\\d{4})\\s?(\\d{4})$",
+ * new TextValueSanitizer(Pattern.compile("^(\\d{4})\\s?(\\d{4})\\s?(\\d{4})\\s?(\\d{4})$"),
  *     "$1$2$3$4")
  * </pre>
  */