Improve Tuner VTS: Generate Live Combos

This CL allows the VTS to read a vendor's configuration file, determine
if the given devices could support the Live dataflow, and generate
all combinations of units to run them on corresponding integration tests.
Each combination is error checked to ensure they meet the minumum
requirements, and any invalid ones are discared, which may narrow the
combination space immensely.

This CL also adds logic to store IP and PCR filter IDs to include
using them in any configuration combinations. We also pair PCR filters
with audio and video filters if the vendor chooses to provide more than
1, enforcing the invariant that the number of pcr, audio, and video
filters must be equal.  If there is only 1 pcr filters, we default to
use that one.

Bug: b/182519645

Test: vts-tradefed run vts --module VtsHalTvTunerTargetTest. Manual
tests with different input configuration files.

Change-Id: Icb2d96b32ed7a14b845c752a79744c44fdaf04e3