Don't clean up operator properties in RuimRecords.

Don't clean up PROPERTY_ICC_OPERATOR_ISO_COUNTRY and
PROPERTY_ICC_OPERATOR_NUMERIC here. Since not all CDMA
devices have RUIM, these properties should keep the original
values, e.g. build time settings, when there is no RUIM but
set new values when RUIM is available and loaded.

bug:4552029
Change-Id: I37c2cea32b582a00873b7f85b70abe30253e1241