GD: Set LE Event Mask

After this patch we enable LE Set Event Mask. Thanks to it we would
receive Extended Create Connection Complete, and Extended Advertising
Reports from real controllers.

Tag: #gd-refactor
Test: run GD on real device, verify extended events are received
Bug: 147086339
Change-Id: I678f3349f624da94042a7d954322398bb0d18f98