[WIP] Long press recent key to toggle last app

Change-Id: I485013fef02a0efdf1e65d01b7e88185db94de91
Revert "[WIP] Long press recent key to toggle last app"

remain it in log

This reverts commit f7f2cd89076e1bfe896e8b6e85c90079b488e9a5.
Bluetooth: DUN: Add framework changes to support DUN

Bluetooth DUN profile APIs added to the framework APIs.
As DUN server supports only disconnection of DUN profile
level connection this API is implemeted along with other
APIs.

It registers bluetooth state changed callback with the
adapter service,once there is a change in the bluetooth
state,it will bind/unbind the DUN service which is
implemented in BluetoothExt.APK.

DUN service, and other DUN Application layer are mplemented
in BluetoothExt.APK.

Change-Id: I6ce1204ac6138e28ad7486f2855f0f7444ad3886