fix: remove invalid track-player config plugin, fix adaptive icon path

mobile/app.json

@@ -15,7 +15,7 @@
     "android": {
       "adaptiveIcon": {
         "backgroundColor": "#121212",
-        "foregroundImage": "./assets/adaptive-icon.png"
+        "foregroundImage": "./assets/android-icon-foreground.png"
       },
       "package": "com.honeyy.novasonic",
       "permissions": [
@@ -23,14 +23,6 @@
         "android.permission.FOREGROUND_SERVICE_MEDIA_PLAYBACK"
       ]
     },
-    "plugins": [
-      [
-        "react-native-track-player",
-        {
-          "androidPackage": "com.guichaguri.trackplayer"
-        }
-      ]
-    ],
     "web": {
       "favicon": "./assets/favicon.png"
     }