Unused BluetoothAdapter causes SecurityException

I somehow triggered a Bluetooth-related permission error in F-Droid Basic which occurred in this code in AppDetailsActivity:

@SuppressWarnings("unused")
protected BluetoothAdapter bluetoothAdapter;
// ...
bluetoothAdapter = getBluetoothAdapter();
// ...
private BluetoothAdapter getBluetoothAdapter() {
    // to use the new, recommended way of getting the adapter
    // http://developer.android.com/reference/android/bluetooth/BluetoothAdapter.html
    return ContextCompat.getSystemService(this, BluetoothManager.class).getAdapter();
}

As the annotation suggests, the field is unused, so there doesn't seem to be a reason for this code to exist at all. It seems to have been used by shareApkBluetooth, which was commented out in commit 402cbcc3. It was moved to AppDetailsActivity in commit 148d1cdc from FDroidApp, where it also had the @SuppressWarnings("unused") annotation.

If there is some reason for this code to exist, it could perhaps be delegated to BluetoothClient so that it's disabled in F-Droid Basic (which doesn't use Bluetooth, I think?) and doesn't cause permission issues.

Anyway, here is the stacktrace. Some line numbers might be off, as I was testing some unrelated changes.

Application does not have bluetooth permission, registering is failed
java.lang.SecurityException: Need BLUETOOTH permission: Neither user 10368 nor current process has android.permission.BLUETOOTH.
	at android.os.Parcel.createExceptionOrNull(Parcel.java:2386)
	at android.os.Parcel.createException(Parcel.java:2370)
	at android.os.Parcel.readException(Parcel.java:2353)
	at android.os.Parcel.readException(Parcel.java:2295)
	at android.bluetooth.IBluetoothManager$Stub$Proxy.registerStateChangeCallback(IBluetoothManager.java:890)
	at android.bluetooth.BluetoothAdapter.<init>(BluetoothAdapter.java:1032)
	at android.bluetooth.BluetoothAdapter.getDefaultAdapter(BluetoothAdapter.java:1012)
	at android.bluetooth.BluetoothManager.<init>(BluetoothManager.java:90)
	at android.app.SystemServiceRegistry$11.createService(SystemServiceRegistry.java:497)
	at android.app.SystemServiceRegistry$11.createService(SystemServiceRegistry.java:494)
	at android.app.SystemServiceRegistry$CachedServiceFetcher.getService(SystemServiceRegistry.java:2350)
	at android.app.SystemServiceRegistry.getSystemService(SystemServiceRegistry.java:2030)
	at android.app.ContextImpl.getSystemService(ContextImpl.java:2003)
	at androidx.appcompat.view.ContextThemeWrapper.getSystemService(ContextThemeWrapper.java:180)
	at android.view.ContextThemeWrapper.getSystemService(ContextThemeWrapper.java:188)
	at android.app.Activity.getSystemService(Activity.java:6896)
	at android.content.Context.getSystemService(Context.java:3736)
	at androidx.core.content.ContextCompat$Api23Impl.getSystemService(ContextCompat.java:1039)
	at androidx.core.content.ContextCompat.getSystemService(ContextCompat.java:768)
	at org.fdroid.fdroid.views.AppDetailsActivity.getBluetoothAdapter(AppDetailsActivity.java:775)
	at org.fdroid.fdroid.views.AppDetailsActivity.onCreate(AppDetailsActivity.java:132)
	at android.app.Activity.performCreate(Activity.java:8207)
	at android.app.Activity.performCreate(Activity.java:8191)
	at android.app.Instrumentation.callActivityOnCreate(Instrumentation.java:1309)
	at android.app.ActivityThread.performLaunchActivity(ActivityThread.java:3819)
	at android.app.ActivityThread.handleLaunchActivity(ActivityThread.java:4022)
	at android.app.servertransaction.LaunchActivityItem.execute(LaunchActivityItem.java:85)
	at android.app.servertransaction.TransactionExecutor.executeCallbacks(TransactionExecutor.java:135)
	at android.app.servertransaction.TransactionExecutor.execute(TransactionExecutor.java:95)
	at android.app.ActivityThread$H.handleMessage(ActivityThread.java:2336)
	at android.os.Handler.dispatchMessage(Handler.java:106)
	at android.os.Looper.loop(Looper.java:246)
	at android.app.ActivityThread.main(ActivityThread.java:8653)
	at java.lang.reflect.Method.invoke(Native Method)
	at com.android.internal.os.RuntimeInit$MethodAndArgsCaller.run(RuntimeInit.java:602)
	at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1130)
Caused by: android.os.RemoteException: Remote stack trace:
	at android.app.ContextImpl.enforce(ContextImpl.java:2115)
	at android.app.ContextImpl.enforceCallingOrSelfPermission(ContextImpl.java:2143)
	at com.android.server.BluetoothManagerService.registerStateChangeCallback(BluetoothManagerService.java:913)
	at android.bluetooth.IBluetoothManager$Stub.onTransact(IBluetoothManager.java:438)
	at android.os.Binder.execTransactInternal(Binder.java:1190)