Fixes crash due to background display of Dialogs

Author: jrichardlai

android/src/main/java/com/remobile/splashscreen/RCTSplashScreen.java

@@ -118,7 +118,9 @@ public void run() {
  }
  splashDialog.setContentView(splashImageView);
  splashDialog.setCancelable(false);
- splashDialog.show();
+ if (!activity.isFinishing()) {
+ splashDialog.show();
+ }
  }
  });
  }