Fix missing FirewallPolicyError class crash

[Pururun]

Also as a bonus fixes missing html support for notification banner message which causes <b> to appear when showing the Always on VPN error banner.

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This change is 

[linear]

DROID-505 Crash when getting Firewall policy error

Steps to reproduce:

1. Install two versions of Mullvad VPN
2. Set one as Always-on VPN and Block connections without VPN
3. Connect and disconnect in both apps
4. Eventually the app will crash with the following error:

java.lang.ClassNotFoundException: Didn't find class "net.mullvad.talpid.tunnel.FirewallPolicyError" on path: DexPathList[[directory "."],nativeLibraryDirectories=[/system/lib64, /system_ext/lib64, /system/lib64, /system_ext/lib64]]

This crash on Google Play might be related:

https://play.google.com/console/u/0/developers/5618373881393887405/app/4974409703413736415/vitals/crashes/4835e7b4f3849c81a82428227442a9c4/details?days=28

[albin-mullvad]

Reviewed 6 of 6 files at r1, all commit messages.
Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @Pururun)

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android/lib/talpid/src/main/kotlin/net/mullvad/talpid/tunnel/FirewallPolicyError.kt line 8 at r1 (raw file):

@Parcelize
enum class FirewallPolicyError : Parcelable {
    Generic

Is this the only possible enum type that they can send?

Code quote:

Generic

[Pururun]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @albin-mullvad)

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android/lib/talpid/src/main/kotlin/net/mullvad/talpid/tunnel/FirewallPolicyError.kt line 8 at r1 (raw file):

Previously, albin-mullvad wrote…

Is this the only possible enum type that they can send?

Yes there is another type that one is windows only.

pub enum FirewallPolicyError {
    /// General firewall failure
    #[error(display = "Failed to set firewall policy")]
    Generic,
    /// An application prevented the firewall policy from being set
    #[cfg(windows)]
    #[error(display = "An application prevented the firewall policy from being set")]
    Locked(Option<BlockingApplication>),
}

[albin-mullvad]

Reviewable status: all files reviewed, 1 unresolved discussion (waiting on @Pururun)

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android/lib/talpid/src/main/kotlin/net/mullvad/talpid/tunnel/FirewallPolicyError.kt line 8 at r1 (raw file):

Previously, Pururun (Jonatan Rhodin) wrote…

Yes there is another type that one is windows only.

pub enum FirewallPolicyError {
    /// General firewall failure
    #[error(display = "Failed to set firewall policy")]
    Generic,
    /// An application prevented the firewall policy from being set
    #[cfg(windows)]
    #[error(display = "An application prevented the firewall policy from being set")]
    Locked(Option<BlockingApplication>),
}

Perfect! 👍

[albin-mullvad]

Reviewable status: complete! all files reviewed, all discussions resolved