fix: kernel mode and slowness

Switch to amenzia backend by default.

Revert to wg official kernel backend as Amnezia's does not work.

app/src/main/java/com/zaneschepke/wireguardautotunnel/module/TunnelModule.kt

@@ -4,7 +4,9 @@ import android.content.Context
 import com.wireguard.android.backend.Backend
 import com.wireguard.android.backend.GoBackend
 import com.wireguard.android.backend.RootTunnelActionHandler
+import com.wireguard.android.backend.WgQuickBackend
 import com.wireguard.android.util.RootShell
+import com.wireguard.android.util.ToolsInstaller
 import com.zaneschepke.wireguardautotunnel.data.repository.AppDataRepository
 import com.zaneschepke.wireguardautotunnel.service.tunnel.TunnelService
 import com.zaneschepke.wireguardautotunnel.service.tunnel.WireGuardTunnel
@@ -43,8 +45,8 @@ class TunnelModule {
 	@Provides
 	@Singleton
 	@Kernel
-	fun provideKernelBackend(@ApplicationContext context: Context, rootShell: org.amnezia.awg.util.RootShell): org.amnezia.awg.backend.Backend {
-		return org.amnezia.awg.backend.AwgQuickBackend(context, rootShell, org.amnezia.awg.util.ToolsInstaller(context, rootShell))
+	fun provideKernelBackend(@ApplicationContext context: Context, rootShell: RootShell): Backend {
+		return WgQuickBackend(context, rootShell, ToolsInstaller(context, rootShell), RootTunnelActionHandler(rootShell))
 	}
 
 	@Provides
@@ -57,15 +59,13 @@ class TunnelModule {
 	@Singleton
 	fun provideVpnService(
 		amneziaBackend: Provider<org.amnezia.awg.backend.Backend>,
-		@Userspace userspaceBackend: Provider<Backend>,
-		@Kernel kernelBackend: Provider<org.amnezia.awg.backend.Backend>,
+		@Kernel kernelBackend: Provider<Backend>,
 		appDataRepository: AppDataRepository,
 		@ApplicationScope applicationScope: CoroutineScope,
 		@IoDispatcher ioDispatcher: CoroutineDispatcher,
 	): TunnelService {
 		return WireGuardTunnel(
 			amneziaBackend,
-			userspaceBackend,
 			kernelBackend,
 			appDataRepository,
 			applicationScope,

app/src/main/java/com/zaneschepke/wireguardautotunnel/service/tunnel/WireGuardTunnel.kt

@@ -32,8 +32,7 @@ class WireGuardTunnel
 @Inject
 constructor(
 	private val amneziaBackend: Provider<org.amnezia.awg.backend.Backend>,
-	@Userspace private val userspaceBackend: Provider<Backend>,
-	@Kernel private val kernelBackend: Provider<org.amnezia.awg.backend.Backend>,
+	@Kernel private val kernelBackend: Provider<Backend>,
 	private val appDataRepository: AppDataRepository,
 	@ApplicationScope private val applicationScope: CoroutineScope,
 	@IoDispatcher private val ioDispatcher: CoroutineDispatcher,
@@ -78,8 +77,7 @@ constructor(
 	private suspend fun backend(): Any {
 		val settings = appDataRepository.settings.getSettings()
 		if (settings.isKernelEnabled) return kernelBackend.get()
-		if (settings.isAmneziaEnabled) return amneziaBackend.get()
-		return userspaceBackend.get()
+		return amneziaBackend.get()
 	}
 
 	override suspend fun startTunnel(tunnelConfig: TunnelConfig): Result<TunnelState> {

app/src/main/java/com/zaneschepke/wireguardautotunnel/ui/screens/settings/SettingsScreen.kt

@@ -491,20 +491,6 @@ fun SettingsScreen(
 					title = stringResource(id = R.string.backend),
 					padding = screenPadding,
 				)
-				ConfigurationToggle(
-					stringResource(R.string.use_amnezia),
-					enabled =
-					!(
-						uiState.settings.isAutoTunnelEnabled ||
-							uiState.settings.isAlwaysOnVpnEnabled ||
-							(uiState.vpnState.status == TunnelState.UP) || uiState.settings.isKernelEnabled
-						),
-					checked = uiState.settings.isAmneziaEnabled,
-					padding = screenPadding,
-					onCheckChanged = {
-						viewModel.onToggleAmnezia()
-					},
-				)
 				ConfigurationToggle(
 					stringResource(R.string.use_kernel),
 					enabled =