Add server-side callback for change in MTU (4/4)

When a client requests to update the LE transport MTU, the server
currently does not get notified and can therefor not properly size
notifications appropriate to the current MTU.

Bug: 18388114
Change-Id: I515bfc2cc9846490d57de71860f41ea9a61fa243

1 files changed, 12 insertions, 0 deletions

diff --git a/framework/java/android/bluetooth/BluetoothGattServerCallback.java b/framework/java/android/bluetooth/BluetoothGattServerCallback.java
index 1dd06f2ce1..2afcf9a322 100644
--- a/framework/java/android/bluetooth/BluetoothGattServerCallback.java
+++ b/framework/java/android/bluetooth/BluetoothGattServerCallback.java
@@ -145,4 +145,16 @@ public abstract class BluetoothGattServerCallback {
      */
     public void onNotificationSent(BluetoothDevice device, int status) {
     }
+
+    /**
+     * Callback indicating the MTU for a given device connection has changed.
+     *
+     * <p>This callback will be invoked if a remote client has requested to change
+     * the MTU for a given connection.
+     *
+     * @param device The remote device that requested the MTU change
+     * @param mtu The new MTU size
+     */
+    public void onMtuChanged(BluetoothDevice device, int mtu) {
+    }
 }