Add FrontendSettingsExt struct in Tuner 1.1

The new FrontendSettingsExt includes more options to configure the
tune and scan action on the IFrontend interface.

This new struct will be used as a parameter in the tune_1_1 and
scan_1_1 APIs of the 1.1 IFrontend.

Test: atest VtsHalTvTunerV1_1TargetTest
Bug: 158818695
Change-Id: Ibe38a0be76969d23255574357d7494188182f467