Fix Popover.android to bubble events correctly

Reviewed By: andreicoman11, fkgozali

Differential Revision: D3197104

fb-gh-sync-id: 882f85175f87200b7aef1ca4204d6dfb6c4c4c69
fbshipit-source-id: 882f85175f87200b7aef1ca4204d6dfb6c4c4c69

Libraries/Modal/Modal.js

@@ -49,13 +49,20 @@ class Modal extends React.Component {
         transparent={this.props.transparent}
         onRequestClose={this.props.onRequestClose}
         onShow={this.props.onShow}
-        style={styles.modal}>
+        style={styles.modal}
+        onStartShouldSetResponder={this._shouldSetResponder}
+        >
         <View style={[styles.container, containerBackgroundColor]}>
           {this.props.children}
         </View>
       </RCTModalHostView>
     );
   }
+
+  // We don't want any responder events bubbling out of the modal.
+  _shouldSetResponder(): boolean {
+    return true;
+  }
 }
 
 Modal.propTypes = {