ui: make when statements exhaustive everywhere

Signed-off-by: Harsh Shandilya <me@msfjarvis.dev>

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

@@ -297,6 +297,7 @@ class TunnelEditorFragment : BaseFragment() {
                                 Snackbar.LENGTH_SHORT
                         ).show()
                     }
+                    is BiometricAuthenticator.Result.Cancelled -> {}
                 }
             }
         } else {

ui/src/main/java/com/wireguard/android/preference/ZipExporterPreference.kt

@@ -98,6 +98,7 @@ class ZipExporterPreference(context: Context, attrs: AttributeSet?) : Preference
                             Snackbar.LENGTH_SHORT
                     ).show()
                 }
+                is BiometricAuthenticator.Result.Cancelled -> {}
             }
         }
     }