Fix: onChange is not called for tap when on Android (#367)

* Indicate user action depending on sliding status

* Always send onValueChange, no matter if fromUser

Author: BartoszKlonowski

src/android/src/main/java/com/reactnativecommunity/slider/ReactSliderManager.java

@@ -109,7 +109,8 @@ public void onStopTrackingTouch(SeekBar seekbar) {
           reactContext.getNativeModule(UIManagerModule.class).getEventDispatcher().dispatchEvent(
               new ReactSliderEvent(
                   seekbar.getId(),
-                  ((ReactSlider)seekbar).toRealProgress(seekbar.getProgress()), false));
+                  ((ReactSlider)seekbar).toRealProgress(seekbar.getProgress()),
+                  !((ReactSlider)seekbar).isSliding()));
         }
       };
 

src/js/Slider.js

@@ -252,14 +252,7 @@ const SliderComponent = (
 
   const onValueChangeEvent = onValueChange
     ? (event: Event) => {
-        let userEvent = true;
-        if (Platform.OS === 'android') {
-          // On Android there's a special flag telling us the user is
-          // dragging the slider.
-          userEvent =
-            event.nativeEvent.fromUser != null && event.nativeEvent.fromUser;
-        }
-        userEvent && onValueChange(event.nativeEvent.value);
+        onValueChange(event.nativeEvent.value);
       }
     : null;