Enable car-ui-lib RROs on all products

Previously the RRO relied on
ro.build.characteristics to be set to
"automotive", which wasn't the case on all
devices. Define a new system property that is
the same across all products with the reference
design.

Fixes: 172085113
Test: Manually
Change-Id: Ic1c5990912a69cceee3968edfd67521c9aa73aa4
3 files changed