Opp: Clear incoming file notification while BT turned OFF.

Use Case:
1.From a remote, send a file to DUT
2.The incoming file request is present in notifications menu
3.Now turn off the BT on the receiver side

Failure:
Incoming file request is still present even after turning off BT.

Fix:
Ensure that incoming file notification will be cleared
from notification bar while BT is turned OFF. Otherwise, incoming file
notification will be displayed on notification bar even though BT is OFF.

CRs-fixed: 610549

Change-Id: I02f63eb486c5fe9c2529d786baee2634bf213fc9