Fix update warning notifications being cut off (fixes #6983)

(cherry picked from commit 20145f7a12)

app/src/main/java/eu/kanade/tachiyomi/data/download/DownloadNotifier.kt

@@ -190,7 +190,7 @@ internal class DownloadNotifier(private val context: Context) {
     fun onWarning(reason: String, timeout: Long? = null) {
         with(errorNotificationBuilder) {
             setContentTitle(context.getString(R.string.download_notifier_downloader_title))
-            setContentText(reason)
+            setStyle(NotificationCompat.BigTextStyle().bigText(reason))
             setSmallIcon(R.drawable.ic_warning_white_24dp)
             setAutoCancel(true)
             clearActions()

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

@@ -93,7 +93,7 @@ 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))
+            setStyle(NotificationCompat.BigTextStyle().bigText(context.getString(R.string.notification_size_warning)))
             setSmallIcon(R.drawable.ic_warning_white_24dp)
             setTimeoutAfter(Downloader.WARNING_NOTIF_TIMEOUT_MS)
         }