Fix getDevice method signature

[Rawa]

As part of a timeboxed issue I looked through Play Store crashes and found that we have the wrong signature on this JNI calling function.

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This change is 

[linear]

DROID-462 NullPointerException on DeviceState.token()

https://play.google.com/console/u/0/developers/5618373881393887405/app/4974409703413736415/vitals/crashes/97f8a96eddf3e0e0e430bbb88fbcb392/details?days=28

Seems like we can get null pointer on DeviceState.token(), this is not handled correctly.

[Rawa]

Reviewable status: 0 of 2 files reviewed, 1 unresolved discussion

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android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/ForegroundNotificationManager.kt line 63 at r1 (raw file):

                daemon
                    ?.deviceStateUpdates
                    ?.onStart { daemon.getAndEmitDeviceState()?.let { emit(it) } }

Not sure how you guys feel about this one? Maybe a bit fail silent? We could also go for !! and just let it crash like before.

[albin-mullvad]

Reviewed 2 of 2 files at r1, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

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android/service/src/main/kotlin/net/mullvad/mullvadvpn/service/ForegroundNotificationManager.kt line 63 at r1 (raw file):

Previously, Rawa (David Göransson) wrote…

Not sure how you guys feel about this one? Maybe a bit fail silent? We could also go for !! and just let it crash like before.

Let's go ahead with this one!

[albin-mullvad]

Reviewed 1 of 1 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved