Add a missing expectation for ASCIICharsetEncoderTest.

Bug: 10837242
Bug: 10729779

(cherry picked from commit 189df91cdff73cf78862df947c8d23b9b9c91b82)

Change-Id: I121f60070f9e79c105a029fd18310fa514046d03
diff --git a/expectations/knownfailures.txt b/expectations/knownfailures.txt
index 6c61475..5055cbf 100644
--- a/expectations/knownfailures.txt
+++ b/expectations/knownfailures.txt
@@ -3,8 +3,9 @@
  */
 [
 {
-  description: "three known CharsetDecoder-/CharsetEncoder-related failures",
+  description: "four known CharsetDecoder-/CharsetEncoder-related failures",
   names: [
+    "org.apache.harmony.nio_char.tests.java.nio.charset.ASCIICharsetEncoderTest#testCanEncodeSurrogate",
     "org.apache.harmony.nio_char.tests.java.nio.charset.ASCIICharsetEncoderTest#testMultiStepEncode",
     "org.apache.harmony.nio_char.tests.java.nio.charset.CharsetDecoderTest#testInvalidDecoding",
     "org.apache.harmony.nio_char.tests.java.nio.charset.CharsetDecoderTest#test_decode"