feat(android): make buffering strategy dynamic (#3756)

* chore: rework bufferConfig to make it more generic and reduce ReactExoplayerView code size
* feat: expose bufferingStrategy to app and change default behavior
rename disableBuffering undocumented prop to bufferingStrategy and document it.
before this change, default was 'dependingOnMemory'. It can trigger some unnecessary gc() call on android.

examples/basic/src/VideoPlayer.tsx

@@ -39,6 +39,7 @@ import Video, {
   OnSeekData,
   OnPlaybackStateChangedData,
   OnPlaybackRateChangeData,
+  BufferingStrategyType,
 } from 'react-native-video';
 import ToggleControl from './ToggleControl';
 import MultiValueControl, {
@@ -934,6 +935,7 @@ class VideoPlayer extends Component {
           poster={this.state.poster}
           onPlaybackRateChange={this.onPlaybackRateChange}
           onPlaybackStateChanged={this.onPlaybackStateChanged}
+          bufferingStrategy={BufferingStrategyType.DEFAULT}
         />
       </TouchableOpacity>
     );