fix: clear notification when app is killed from recent tasks (#6063)

app/src/main/AndroidManifest.xml

@@ -394,6 +394,10 @@
             android:exported="false"
             android:foregroundServiceType="mediaPlayback" />
 
+        <service android:name=".services.OnClearFromRecentService"
+            android:enabled="true"
+            android:exported="false" />
+
         <receiver
             android:name=".receivers.NotificationReceiver"
             android:enabled="true"

app/src/main/java/com/github/libretube/services/OnClearFromRecentService.kt

@@ -0,0 +1,28 @@
+package com.github.libretube.services
+
+import android.app.NotificationManager
+import android.app.Service
+import android.content.Intent
+import android.os.IBinder
+import androidx.core.content.getSystemService
+import com.github.libretube.enums.NotificationId
+
+class OnClearFromRecentService : Service() {
+    private var nManager: NotificationManager? = null
+
+    override fun onBind(p0: Intent?): IBinder? = null
+
+    override fun onStartCommand(
+        intent: Intent?,
+        flags: Int,
+        startId: Int,
+    ): Int {
+        nManager = getSystemService<NotificationManager>()
+        return START_NOT_STICKY
+    }
+
+    override fun onTaskRemoved(rootIntent: Intent?) {
+        nManager?.cancel(NotificationId.PLAYER_PLAYBACK.id)
+        stopSelf()
+    }
+}

app/src/main/java/com/github/libretube/util/NowPlayingNotification.kt

@@ -28,6 +28,7 @@ import com.github.libretube.extensions.toMediaMetadataCompat
 import com.github.libretube.helpers.ImageHelper
 import com.github.libretube.helpers.PlayerHelper
 import com.github.libretube.obj.PlayerNotificationData
+import com.github.libretube.services.OnClearFromRecentService
 import com.github.libretube.ui.activities.MainActivity
 import java.util.UUID
 
@@ -303,6 +304,7 @@ class NowPlayingNotification(
                     super.onIsPlayingChanged(isPlaying)
                 }
             })
+            context.startService(Intent(context, OnClearFromRecentService::class.java))
         }
 
         createOrUpdateNotification()