Make BluetoothGattServer.close() public

This functino is needed for applications to un-register from the
Bluetooth stack.
bug 8591003

Change-Id: Id05f592245d1d90791d34c3617aadac67bc6502c
diff --git a/api/current.txt b/api/current.txt
index 7451a93..ef00be7 100644
--- a/api/current.txt
+++ b/api/current.txt
@@ -5018,6 +5018,7 @@
     method public boolean addService(android.bluetooth.BluetoothGattService);
     method public void cancelConnection(android.bluetooth.BluetoothDevice);
     method public void clearServices();
+    method public void close();
     method public boolean connect(android.bluetooth.BluetoothDevice, boolean);
     method public java.util.List<android.bluetooth.BluetoothDevice> getConnectedDevices();
     method public int getConnectionState(android.bluetooth.BluetoothDevice);
diff --git a/core/java/android/bluetooth/BluetoothGattServer.java b/core/java/android/bluetooth/BluetoothGattServer.java
index 644c619b..d7f150b 100644
--- a/core/java/android/bluetooth/BluetoothGattServer.java
+++ b/core/java/android/bluetooth/BluetoothGattServer.java
@@ -288,9 +288,9 @@
     }
 
     /**
-     * Close the connection to the gatt service.
+     * Close this GATT server instance.
      */
-    /*package*/ void close() {
+    public void close() {
         if (DBG) Log.d(TAG, "close()");
         unregisterCallback();
     }