Expose WifiConfiguration.SuiteBCipher

WifiConfiguration.SuiteBCipher is linked in
documentation of public API
WifiConfiguration.allowedSuiteBCiphers.
Thus expose SuiteBCipher as a public API.

Bug: 147711708
Test: compiles
Change-Id: Ib913f92d61dce29da4660a3f2f08c8c17d939b71
diff --git a/framework/java/android/net/wifi/WifiConfiguration.java b/framework/java/android/net/wifi/WifiConfiguration.java
index ee2b575..f8dc9d8 100644
--- a/framework/java/android/net/wifi/WifiConfiguration.java
+++ b/framework/java/android/net/wifi/WifiConfiguration.java
@@ -372,7 +372,6 @@
      * ECDHE_ECDSA
      * ECDHE_RSA
      * </pre>
-     * @hide
      */
     public static class SuiteBCipher {
         private SuiteBCipher() { }