Fix updating max circulation value.

The individual EconomicPolicies were correctly reading the Settings
constants for the max circulation in setup(), but
CompleteEconomicPolicy treated those values as final upon
initialization, so it wasn't updating the max circulation.

Bug: 158300259
Test: set value via adb and confirm limit increased in dumpsys
Change-Id: Ic9769a4173d652d8dc2ca43677e4618c57869613