Root-Canal: Adjust the eSCO retransmission window

- Increase the window for the retransmission mode
  Optimize for Link Quality: the PTS tool runs
  checks on the link parameters and expects higher
  retransmissions in this case

Bug: 209800014
Tag: #feature
Test: cert/run
Change-Id: I26c2c28ac711cf15deb25f5a2070ea063c5cd61f