rog2: simplify custom init for stock/vendor updates

Rather than changing multiple flags and init values when there
are stock updates, consolidate values and use code to create the
properties as needed. This means that only one or two items will
need to be changed for future updates, rather than 14.

Remove several of the property overrides for the US variant, since
the default values already match the stock values.

No longer set ro.product.vendor.model as the custom init is setting
the other model properties to match what already exists for vendor.

Change-Id: If5a5157230f71205facf549eb7cfd2abaf04df0e
2 files changed