coroutines: use lifecycleScope where appropriate

There's still a bit of GlobalScope lingering around, which might be
removable.

Signed-off-by: Jason A. Donenfeld <Jason@zx2c4.com>

ui/src/main/java/com/wireguard/android/fragment/BaseFragment.kt

@@ -12,6 +12,7 @@ import android.widget.Toast
 import androidx.databinding.DataBindingUtil
 import androidx.databinding.ViewDataBinding
 import androidx.fragment.app.Fragment
+import androidx.lifecycle.lifecycleScope
 import com.google.android.material.snackbar.Snackbar
 import com.wireguard.android.Application
 import com.wireguard.android.R
@@ -24,7 +25,6 @@ import com.wireguard.android.databinding.TunnelListItemBinding
 import com.wireguard.android.model.ObservableTunnel
 import com.wireguard.android.util.ErrorMessages
 import kotlinx.coroutines.Dispatchers
-import kotlinx.coroutines.GlobalScope
 import kotlinx.coroutines.launch
 
 /**
@@ -72,7 +72,7 @@ abstract class BaseFragment : Fragment(), OnSelectedTunnelChangedListener {
             is TunnelListItemBinding -> binding.item
             else -> return
         } ?: return
-        GlobalScope.launch(Dispatchers.Main.immediate) {
+        lifecycleScope.launch(Dispatchers.Main.immediate) {
             if (Application.getBackend() is GoBackend) {
                 val intent = GoBackend.VpnService.prepare(view.context)
                 if (intent != null) {
@@ -87,7 +87,7 @@ abstract class BaseFragment : Fragment(), OnSelectedTunnelChangedListener {
     }
 
     private fun setTunnelStateWithPermissionsResult(tunnel: ObservableTunnel, checked: Boolean) {
-        GlobalScope.launch(Dispatchers.Main.immediate) {
+        lifecycleScope.launch(Dispatchers.Main.immediate) {
             try {
                 tunnel.setStateAsync(Tunnel.State.of(checked))
             } catch (e: Throwable) {