tree c269387ee3822948fb617bc94395b04490e5bc00
parent 6fb74b225ec5efc8caef0fec82692e33392b8ecb
author Andre Eisenbach <eisenbach@google.com> 1396043719 -0700
committer Andre Eisenbach <eisenbach@google.com> 1403912498 -0700

LE: Add notification sent and congestion callbacks (4/4)

This change introduces two new callbacks for applications to better
handle LE notification flow control and transport congestion. The
notification callback is invoked when the remote platform confirms an
indication or when a local notification has been passed to the
controller. No new notifications should be sent until a callback is
received.

Congestion callbacks are triggered when a GATT operation cannot be sent
to the local Bluetooth controller. Repeatedly calling
writeCharacteristic() for example will eventually trigger a congestion
callback. Applications cannot send additional data until a further
callback is received, indicating that the congestion has cleared up.

Change-Id: I5feb555b4843bd25b1d40338651695ac082e1386