Switch from KeyStore.delKey/saw to KeyStore.delete/list.

KeyStore.delKey was replaced by KeyStore.delete, and KeyStore.saw was
replaced by KeyStore.list.

Bug: 18088752
Change-Id: I45eae9d252dc304f9d8d6fa8bfd1a9729ef090b3
diff --git a/src/com/android/keychain/KeyChainActivity.java b/src/com/android/keychain/KeyChainActivity.java
index 0bb7bba..410956f 100644
--- a/src/com/android/keychain/KeyChainActivity.java
+++ b/src/com/android/keychain/KeyChainActivity.java
@@ -196,7 +196,7 @@
 
     private class AliasLoader extends AsyncTask<Void, Void, CertificateAdapter> {
         @Override protected CertificateAdapter doInBackground(Void... params) {
-            String[] aliasArray = mKeyStore.saw(Credentials.USER_PRIVATE_KEY);
+            String[] aliasArray = mKeyStore.list(Credentials.USER_PRIVATE_KEY);
             List<String> aliasList = ((aliasArray == null)
                                       ? Collections.<String>emptyList()
                                       : Arrays.asList(aliasArray));