Adjust update/download warnings

This is a partial revert/evolution of 538dd60580

- Back to notifications, because Android 12+ may cut off toasts
- Notifications now automatically dismiss after 30s on Android 8+ (taken from J2K)
- Also warn if more than 30 chapters are queued for download

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateNotifier.kt

@@ -90,6 +90,20 @@ class LibraryUpdateNotifier(private val context: Context) {
         )
     }
 
+    fun showQueueSizeWarningNotification() {
+        val notificationBuilder = context.notificationBuilder(Notifications.CHANNEL_LIBRARY_PROGRESS) {
+            setContentTitle(context.getString(R.string.label_warning))
+            setContentText(context.getString(R.string.notification_size_warning))
+            setSmallIcon(R.drawable.ic_warning_white_24dp)
+            setTimeoutAfter(Downloader.WARNING_NOTIF_TIMEOUT_MS)
+        }
+
+        context.notificationManager.notify(
+            Notifications.ID_LIBRARY_SIZE_WARNING,
+            notificationBuilder.build(),
+        )
+    }
+
     /**
      * Shows notification containing update entries that failed with action to open full log.
      *

app/src/main/java/eu/kanade/tachiyomi/data/library/LibraryUpdateService.kt

@@ -5,7 +5,6 @@ import android.content.Context
 import android.content.Intent
 import android.os.IBinder
 import android.os.PowerManager
-import android.widget.Toast
 import androidx.core.content.ContextCompat
 import eu.kanade.tachiyomi.R
 import eu.kanade.tachiyomi.data.cache.CoverCache
@@ -42,7 +41,6 @@ import eu.kanade.tachiyomi.util.system.acquireWakeLock
 import eu.kanade.tachiyomi.util.system.createFileInCacheDir
 import eu.kanade.tachiyomi.util.system.isServiceRunning
 import eu.kanade.tachiyomi.util.system.logcat
-import eu.kanade.tachiyomi.util.system.toast
 import kotlinx.coroutines.CoroutineExceptionHandler
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Dispatchers
@@ -271,7 +269,7 @@ class LibraryUpdateService(
             .filterKeys { sourceManager.get(it) !is UnmeteredSource }
             .maxOfOrNull { it.value.size } ?: 0
         if (maxUpdatesFromSource > MANGA_PER_SOURCE_QUEUE_WARNING_THRESHOLD) {
-            toast(R.string.notification_size_warning, Toast.LENGTH_LONG)
+            notifier.showQueueSizeWarningNotification()
         }
     }