Add default scrollEventThrottle to Animated{FlatList, SectionList} (#24954)

Summary:
`scrollEventThrottle` is often a source of confusion, especially when using native animated since users expect that it doesn't affect `Animated.event` but it does. We added a default prop to Animated.ScrollView but not to `Animated.FlatList` and `Animated.SectionList` so this adds it for those.

## Changelog

[JavaScript] [Added] - Add default scrollEventThrottle to Animated{FlatList, SectionList}
Pull Request resolved: #24954

Differential Revision: D15411998

Pulled By: cpojer

fbshipit-source-id: 41589a96c0a8b75ae7cf3169ccef363ac5140ad3

Author: janicduplessis

Libraries/Animated/src/components/AnimatedFlatList.js

@@ -14,4 +14,6 @@ const FlatList = require('../../../Lists/FlatList');
 
 const createAnimatedComponent = require('../createAnimatedComponent');
 
-module.exports = createAnimatedComponent(FlatList);
+module.exports = createAnimatedComponent(FlatList, {
+  scrollEventThrottle: 0.0001,
+});

Libraries/Animated/src/components/AnimatedSectionList.js

@@ -14,4 +14,6 @@ const SectionList = require('../../../Lists/SectionList');
 
 const createAnimatedComponent = require('../createAnimatedComponent');
 
-module.exports = createAnimatedComponent(SectionList);
+module.exports = createAnimatedComponent(SectionList, {
+  scrollEventThrottle: 0.0001,
+});