Add TV tuner audio preselection support

DVB MPEG-2 transport streams can include audio preselection descriptors
for next-generation audio (NGA) as specified in ETSI EN 300 468. Add
support for audio preselections in DemuxFilterMediaEvent.

Note that, when an audio preselection descriptor is present for a NGA
stream, receivers are required to ignore (supplementary) audio
descriptors (see Annex M.2).

Bug: 264812332
Test: `atest VtsHalTvTunerTargetTest` on cf_x86_tv-userdebug
Change-Id: I5b6d9a86aa74feb87879125f57ca36d7e71bbdf4