Scanning possible when bluetooth is off

**Describe the bug**
When the Bluetooth is off, the plugin can still detect Bluetooth devices (this only happens on Android). Even it's possible to connect.

**To Reproduce**
Steps to reproduce the behavior:
1. Clone the project https://github.com/juniorsaraviao/BluetoothSample/tree/master
2. Run the project on Android.
3. Turn off the Bluetooth.
4. Tap Scan.

**Expected behavior**
The plugin shouldn't be able to detect devices when the Bluetooth is off.

**Screenshots**
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**Plugin version:**
- @capacitor-community/bluetooth-le: v3.1.2

**Desktop (please complete the following information):**
- OS: Android

**Smartphone (please complete the following information):**
- Device: Samsung Galaxy A53
- OS: Android
- Version 14

Reproduce the issue with the linked BluetoothSample on Android 14 by disabling Bluetooth and tapping Scan. Trace the plugin's Android scanning entry point and verify that scanning and connections are unavailable while Bluetooth is off; repeat the reproduction steps to confirm the fix.

Written by the indexing model from the issue text.