OPP: Clear all BT Notification while switching off BT

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:
All BT related notification will be cleared from notification bar while BT is
being turned OFF. Otherwise, incoming file notification will be displayed on
notification bar even though BT is OFF.

Test: Incoming file notifications are removed after BT is turned off.

Bug: 35985175
Change-Id: Ib501eb1241668436dc0ff995e61885d481636258