Fix android crashes and add modal exit button

src/screens/modals/Player/index.tsx

@@ -6,10 +6,13 @@ import Queue from './components/Queue';
 import ConnectionNotice from './components/ConnectionNotice';
 import { GestureHandlerRootView } from 'react-native-gesture-handler';
 import StreamStatus from './components/StreamStatus';
+import { Platform } from 'react-native';
+import BackButton from './components/Backbutton';
 
 export default function Player() {    
     return (
         <GestureHandlerRootView style={{ flex: 1 }}>
+            {Platform.OS === 'android' && (<BackButton />)}
             <Queue header={(
                 <>
                     <NowPlaying />