App state banner tweaks (#8746)

* Move download indexing notification to this banner group
* Animate state changes

app/src/main/java/eu/kanade/tachiyomi/data/notification/Notifications.kt

@@ -40,8 +40,6 @@ object Notifications {
     const val ID_DOWNLOAD_CHAPTER_PROGRESS = -201
     const val CHANNEL_DOWNLOADER_ERROR = "downloader_error_channel"
     const val ID_DOWNLOAD_CHAPTER_ERROR = -202
-    const val CHANNEL_DOWNLOADER_CACHE = "downloader_cache_renewal"
-    const val ID_DOWNLOAD_CACHE = -204
 
     /**
      * Notification channel and ids used by the library updater.
@@ -91,6 +89,7 @@ object Notifications {
         "library_channel",
         "library_progress_channel",
         "updates_ext_channel",
+        "downloader_cache_renewal",
     )
 
     /**
@@ -155,12 +154,6 @@ object Notifications {
                     setGroup(GROUP_DOWNLOADER)
                     setShowBadge(false)
                 },
-                buildNotificationChannel(CHANNEL_DOWNLOADER_CACHE, IMPORTANCE_LOW) {
-                    setName(context.getString(R.string.channel_downloader_cache))
-                    setGroup(GROUP_DOWNLOADER)
-                    setShowBadge(false)
-                    setSound(null, null)
-                },
                 buildNotificationChannel(CHANNEL_BACKUP_RESTORE_PROGRESS, IMPORTANCE_LOW) {
                     setName(context.getString(R.string.channel_progress))
                     setGroup(GROUP_BACKUP_RESTORE)