Fix manga importing

app/src/main/AndroidManifest.xml

@@ -279,6 +279,10 @@
 		<service
 			android:name="org.koitharu.kotatsu.local.ui.LocalIndexUpdateService"
 			android:label="@string/local_manga_processing" />
+		<service
+			android:name="org.koitharu.kotatsu.local.ui.ImportService"
+			android:foregroundServiceType="dataSync"
+			android:label="@string/importing_manga" />
 		<service
 			android:name="org.koitharu.kotatsu.widget.shelf.ShelfWidgetService"
 			android:label="@string/manga_shelf"

app/src/main/kotlin/org/koitharu/kotatsu/local/ui/ImportService.kt

@@ -152,7 +152,8 @@ class ImportService : CoroutineIntentService() {
 		private const val CHANNEL_ID = "importing"
 		private const val FOREGROUND_NOTIFICATION_ID = 37
 
-		fun start(context: Context, uris: Iterable<Uri>): Boolean = try {
+		fun start(context: Context, uris: Collection<Uri>): Boolean = try {
+			require(uris.isNotEmpty())
 			for (uri in uris) {
 				val intent = Intent(context, ImportService::class.java)
 				intent.putExtra(DATA_URI, uri.toString())