Implemented equality check and Initializing formals constructor for all pie_chart_data classes.
Implemented equality check and Initializing formals constructor for all pie_chart_data classes.

imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart,imaNNeoFighT/fl_chart