Fix: functionality issue for toggleFocusOnPress prop and incorrect color issue for focusOnPress prop in PieChart component

[HASH-0021]

1. toggleFocusOnPress functionality issue:

• Issue: Focused pie section doesn't go out of focus when pressed again.
• Reason: selectedIndex prop is used at few instances in PieChartMain component and getPieChartMainProps function (gifted-charts-core). One of these instances handles toggleFocusOnPress. But selectedIndex prop was never included in PieChartMain component call inside PieChart component.
• Fix: Including the selectedIndex prop in PieChartMain component call inside PieChart component.

2. Incorrect fill prop value for focused pie section at index 0:

• Issue: If pie section at index 0 is focused, then the fill prop is set to none for the focused pie section.
• Fix: Removing the selectedIndex === index condition where fill prop is set to "none".

3. Incorrect color for focused pie sections at indices other than 0:

• Issue: When data prop doesn't include color property for some values, then the color for the focused pie section belonging to those values is set to the color of pie section at index 0.
• Fix: Including selectedIndex condition for fill prop where pie section color is not given.