Move start advertise method to advertising interface (3/3)

Advertising related code should be exposed through
BleAdvertiserInterface. Move client.listen function into this interface.
Remove reduntant clientif parameter.

Bug: 30622771
Bug: 24099160
Test: no tests necessary
Change-Id: Icc865c062e3d7c4b83bbeea6ff5b08bd2c1c4d9a