fix: background service stops when using add to queue/playlist/download share action

app/src/main/java/com/github/libretube/ui/activities/AddToPlaylistActivity.kt

@@ -29,7 +29,7 @@ class AddToPlaylistActivity : BaseActivity() {
         }?.getStringExtra(IntentData.videoId)
 
         if (videoId == null) {
-            finishAndRemoveTask()
+            finish()
             return
         }
 

app/src/main/java/com/github/libretube/ui/activities/AddToQueueActivity.kt

@@ -33,6 +33,6 @@ class AddToQueueActivity : BaseActivity() {
             startActivity(newIntent)
         }
 
-        finishAndRemoveTask()
+        finish()
     }
 }

app/src/main/java/com/github/libretube/ui/activities/DownloadActivity.kt

@@ -41,7 +41,7 @@ class DownloadActivity : BaseActivity() {
                 )
             }.show(supportFragmentManager, null)
         } else {
-            finishAndRemoveTask()
+            finish()
         }
     }
 }