gd: Rename some of the declarations for HCI packets

Rename definitions related to extended advertising to be
compliant with the specification. For extended advertising
parameters, rewrite the definition of advertising event
properties to be more user friendly

Bug: 245578454
Test: gd cert
Ignore-AOSP-First: cherry-pick from AOSP
Change-Id: I39f953046964a634e89964c45214c2b2f7e9a927
Merged-In: I39f953046964a634e89964c45214c2b2f7e9a927