@hide ConnectionService APIs.

Bug: 17569532
Change-Id: I68f7237191bd6d7a1a00ba7bb4fd2f8e3d669e8f
diff --git a/telecomm/java/android/telecom/Connection.java b/telecomm/java/android/telecom/Connection.java
index 7979e44..13acc59 100644
--- a/telecomm/java/android/telecom/Connection.java
+++ b/telecomm/java/android/telecom/Connection.java
@@ -19,6 +19,7 @@
 import com.android.internal.telecom.IVideoCallback;
 import com.android.internal.telecom.IVideoProvider;
 
+import android.annotation.SystemApi;
 import android.net.Uri;
 import android.os.Handler;
 import android.os.IBinder;
@@ -43,7 +44,9 @@
  * Implementations are then responsible for updating the state of the {@code Connection}, and
  * must call {@link #destroy()} to signal to the framework that the {@code Connection} is no
  * longer used and associated resources may be recovered.
+ * @hide
  */
+@SystemApi
 public abstract class Connection {
 
     public static final int STATE_INITIALIZING = 0;
@@ -873,7 +876,7 @@
         return mUnmodifiableConferenceableConnections;
     }
 
-    /*
+    /**
      * @hide
      */
     public final void setConnectionService(ConnectionService connectionService) {