Use constraints in UI state for FilterScreen

[Rawa]

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This change is 

[Pururun]

Reviewed 14 of 14 files at r1, all commit messages.
Reviewable status: all files reviewed, 3 unresolved discussions (waiting on @Rawa)

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android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/state/RelayFilterUiState.kt line 35 at r1 (raw file):

                providerToOwnerships
                    .filterValues { selectedOwnership.value in it }
                    .keys

Should probaby be an extensionfunction

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android/lib/model/src/main/kotlin/net/mullvad/mullvadvpn/lib/model/Providers.kt line 3 at r1 (raw file):

package net.mullvad.mullvadvpn.lib.model

typealias Providers = List<ProviderId>

Great that this removed. ⭐

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android/app/src/main/kotlin/net/mullvad/mullvadvpn/compose/screen/FilterScreen.kt line 125 at r1 (raw file):

            if (ownershipExpanded) {
                item(key = Keys.OWNERSHIP_ALL, contentType = ContentType.ITEM) {
                    AnyOwnership(state, { onSelectedOwnership(Constraint.Any) })

I think this should probably be moved back into the AnyOwnershipfunction.