Add toggle button for split tunneling

[MaryamShaghaghi]

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This change is 

[Pururun]

Reviewed 10 of 10 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @MaryamShaghaghi)

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android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/SplitTunnelingViewModel.kt line 85 at r1 (raw file):

    }

    fun onShowAppList(show: Boolean) {

This should be changed to enableSplitTunneling or something similar.

[MaryamShaghaghi]

Reviewable status: 8 of 10 files reviewed, 1 unresolved discussion (waiting on @Pururun)

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android/app/src/main/kotlin/net/mullvad/mullvadvpn/viewmodel/SplitTunnelingViewModel.kt line 85 at r1 (raw file):

Previously, Pururun (Jonatan Rhodin) wrote…

This should be changed to enableSplitTunneling or something similar.

Done.

[Pururun]

Reviewed 2 of 2 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved

[Pururun]

Opened a new PR with the same commits here, just adjusted for compose navigation: #5641