Correctly open urls in browser on Android 11+

- Fix misconfiguration in manifest ('http|https|market' is not valid)
- Split ShareUtils functions taking a boolean parameter into pairs of functions with better names and less runtime checks
- Move all Kore-related functions to KoreUtils
- Remove the toast_no_player string

app/src/main/AndroidManifest.xml

@@ -15,7 +15,7 @@
     <queries>
         <intent>
             <action android:name="android.intent.action.VIEW" />
-            <data android:scheme="http|https|market" />
+            <data android:scheme="http" />
         </intent>
     </queries>