BLEScanService: Allow supported ScanSettings on Android API level 23

app/src/main/java/nodomain/freeyourgadget/gadgetbridge/service/btle/BLEScanService.java

@@ -1,3 +1,20 @@
+/*  Copyright (C) 2024 Daniel Dakhno, José Rebelo, Andreas Shimokawa
+
+    This file is part of Gadgetbridge.
+
+    Gadgetbridge is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as published
+    by the Free Software Foundation, either version 3 of the License, or
+    (at your option) any later version.
+
+    Gadgetbridge is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <https://www.gnu.org/licenses/>. */
+
 package nodomain.freeyourgadget.gadgetbridge.service.btle;
 
 import android.Manifest;
@@ -17,6 +34,7 @@ import android.content.Context;
 import android.content.Intent;
 import android.content.IntentFilter;
 import android.content.pm.PackageManager;
+import android.os.Build;
 import android.os.Handler;
 import android.os.IBinder;
 
@@ -357,11 +375,14 @@ public class BLEScanService extends Service {
         final ScanSettings.Builder scanSettingsBuilder = new ScanSettings.Builder()
                 .setScanMode(ScanSettings.SCAN_MODE_LOW_POWER); // enforced anyway in background
 
-        if (android.os.Build.VERSION.SDK_INT >= android.os.Build.VERSION_CODES.O) {
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.M) {
             scanSettingsBuilder
                     .setCallbackType(ScanSettings.CALLBACK_TYPE_ALL_MATCHES)
-                    .setMatchMode(ScanSettings.MATCH_MODE_STICKY)
+                    .setMatchMode(ScanSettings.MATCH_MODE_STICKY);
-                    .setLegacy(false);
+        }
+
+        if (Build.VERSION.SDK_INT >= Build.VERSION_CODES.O) {
+            scanSettingsBuilder.setLegacy(false);
         }
 
         scanner.startScan(scanFilters, scanSettingsBuilder.build(), scanCallback);