Android - Event handler BatteryInfoChanged unsubscribe crashes when no subscribe has happened before

[dieterboullart]

Description

After migration from Xamarin Essentials to MAUI Essentials I got a NullReferenceException on unsubscribing to the event BatteryInfoChanged, because in Batter

In Xamarin Essentials there was a check in the BatteryImplementation.BatteryInfoChanged "remove" code with a variable "wasRunning". For some reason this check was removed in MAUI Essentials. And this causes my code to crash in MAUI Essentials and not in Xamarin Essentials.

The same issue will probably occur with all other events on IBattery.

Steps to Reproduce

Reproduction steps for Android (didn't test on other platforms):

1. Inject an IBattery dependency in your class constructor.
2. Call _battery.BatteryInfoChanged -= (sender, args) => { };
3. Null reference exception occurs in Battery.android.cs on line 66 on batteryReceiver.Dispose() because batteryReceiver has never been initialized.

Link to public reproduction project repository

No response

Version with bug

7.0.96

Is this a regression from previous behavior?

Yes, this used to work in Xamarin.Forms

Last version that worked well

Unknown/Other

Affected platforms

Android

Affected platform versions

Android (any version)

Did you find any workaround?

No response

Relevant log output

No response

[ghost]

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