ZegoEffectsNoseNarrowingParam constructor Null safety

1. zego_effects_plugin
2. zego_effects_defines
3. ZegoEffectsNoseNarrowingParam
4. ZegoEffectsNoseNarrowingParam constructor

ZegoEffectsNoseNarrowingParam class

1. Constructors
2. ZegoEffectsNoseNarrowingParam
3. Properties
4. intensity