try to add cross device stuff

Author: kavishdevar

AAP Definitions.md

@@ -240,6 +240,31 @@ For left bud
 00 0080 3F
 <same for the right bud>
 ```
+
+<!-- demo packet
+52 18 00 00 00 00 00 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 00 00 80 3f 00 00 80 3f 00 00 80 3f 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 62 10 DA 41 00 00 80 3f 00 00 80 3f 00 00 80 3f
+
+-->
+<!-- 
+5218 0000 0080 3F62 10DA 413D 0AF0 4160
+E50C 42AC 9C1E 421B 2F29 429E 6F33 4293
+1846 4293 1846 4206 9476 BF00 576E BB00
+0080 3F00 0080 3F62 10DA 413D 0AF0 4160
+E50C 42AC 9C1E 421B 2F29 429E 6F33 4293
+1846 4293 1846 4200 0080 BF00 576E BB00
+0080 3F00 0080 3F
+-->
+
+<!-- 
+5218 0000 0000 0062 10DA 413D 0AF0 4160
+E50C 42AC 9C1E 421B 2F29 429E 6F33 4293
+1846 4293 1846 4206 9476 BF00 576E BB00
+0080 3F00 0080 3F62 10DA 413D 0AF0 4160
+E50C 42AC 9C1E 421B 2F29 429E 6F33 4293
+1846 4293 1846 4200 0080 BF00 576E BB00
+0080 3F00 0080 3F
+ -->
+
 All values are formatted as Little Endian from float values.
 | Data                | Type          | Value range |
 |---------------------|---------------|-------------|

android/app/src/main/java/me/kavishdevar/aln/utils/CrossDevice.kt

@@ -45,7 +45,7 @@ object CrossDevice {
 
     @SuppressLint("MissingPermission")
     fun startServer() {
-        serverSocket = bluetoothAdapter.listenUsingRfcommWithServiceRecord("AirPodsSwitch", uuid)
+        serverSocket = bluetoothAdapter.listenUsingRfcommWithServiceRecord("ALNCrossDevice", uuid)
         Log.d("AirPodsQuickSwitchService", "Server started")
         CoroutineScope(Dispatchers.IO).launch {
             while (serverSocket != null) {

libbluetooth_jni_juan.so

@@ -322,6 +322,11 @@ public slots:
             socket->close();
             socket = nullptr;
         }
+        if (phoneSocket && phoneSocket->isOpen()) {
+            QByteArray airpodsDisconnectedPacket = QByteArray::fromHex("00010000");
+            phoneSocket->write(airpodsDisconnectedPacket);
+            LOG_DEBUG("AIRPODS_DISCONNECTED packet written: " << airpodsDisconnectedPacket.toHex());
+        }
     }
 
     void connectToDevice(const QBluetoothDeviceInfo &device) {