OPP: Fix Functionality failure for OPP Rx

Usecase:
Send file from Remote BT device to DUT

Expectation:
File should be received properly

Observation:
File reception popup does not occur on DUT

Root Cause:
Socket listener not started for OPP

Fix:
Add changes to properly start listeners for OPP

Test:
1) Verified that SDP records for OPP are exposed and can be browsed
  by remote OPP Client.
2) File can be received without issues from OPP Client.

Bug: 35416619
Change-Id: I5b4f343f3fd7b957ce423ce2cb76cd0683e10c3a