reworked placeholder

also fixed downloads finishing early and reading corrupted files

android/app/src/main/java/com/subsonify/MainActivity.java

@@ -1,6 +1,7 @@
 package com.subsonify;
 
 import com.facebook.react.ReactActivity;
+import android.os.Bundle;
 
 public class MainActivity extends ReactActivity {
 
@@ -12,4 +13,9 @@ public class MainActivity extends ReactActivity {
   protected String getMainComponentName() {
     return "SubSonify";
   }
+
+  @Override
+  protected void onCreate(Bundle savedInstanceState) {
+      super.onCreate(null);
+  }
 }