Add unit of raidus in dialog used to enter custom radius

lib/db/files_db.dart

@@ -1399,7 +1399,8 @@ class FilesDB {
   // user and upload time is greater than 20 April 2023 epoch time and less than
   // 15 May 2023 epoch time
   Future<List<String>> getFilesWithLocationUploadedBtw20AprTo15May2023(
-      int ownerID) async {
+    int ownerID,
+  ) async {
     final db = await database;
     final result = await db.query(
       filesTable,

lib/services/search_service.dart

@@ -15,7 +15,6 @@ import 'package:photos/models/search/album_search_result.dart';
 import 'package:photos/models/search/generic_search_result.dart';
 import 'package:photos/models/search/search_result.dart';
 import 'package:photos/services/collections_service.dart';
-import "package:photos/services/feature_flag_service.dart";
 import "package:photos/services/location_service.dart";
 import "package:photos/states/location_screen_state.dart";
 import "package:photos/ui/viewer/location/location_screen.dart";

lib/ui/viewer/location/radius_picker_widget.dart

@@ -196,6 +196,8 @@ class _RadiusPickerWidgetState extends State<RadiusPickerWidget> {
       submitButtonLabel: "Done",
       textInputFormatter: [NumberWithDecimalInputFormatter(maxValue: 10000)],
       textInputType: const TextInputType.numberWithOptions(decimal: true),
+      message: "km",
+      alignMessage: Alignment.centerRight,
     );
     if (result is Exception) {
       await showGenericErrorDialog(context: context);