fix(android): add subtitleStyle.subtitlesFollowVideo prop to control subtitles positionning (#4133)

* fix(android): add subtitleStyle.subtitlesFollowVideo prop to control subtitles positionning
* docs: add new prop description
* docs: add supported platform for subtitleStyle
* chore: use constructor instead of parse

src/specs/VideoNativeComponent.ts

@@ -131,6 +131,7 @@ type SubtitleStyle = Readonly<{
   paddingLeft?: WithDefault<Float, 0>;
   paddingRight?: WithDefault<Float, 0>;
   opacity?: WithDefault<Float, 1>;
+  subtitlesFollowVideo?: WithDefault<boolean, true>;
 }>;
 
 type OnLoadData = Readonly<{

src/types/video.ts

@@ -168,6 +168,7 @@ export type SubtitleStyle = {
   paddingLeft?: number;
   paddingRight?: number;
   opacity?: number;
+  subtitlesFollowVideo?: boolean;
 };
 
 export enum TextTrackType {