Encryption Flow Coordinators. (#3471)

* Manage the secure backup screens with flow coordinators.

* Add UI tests for the EncryptionSettingsFlowCoordinator.

* Realise that the settings flow can't reset anymore and remove the sub-flow 🤦‍♂️

* Add UI tests for the EncryptionResetFlowCoordinator.

ElementX/Sources/Screens/EncryptionReset/EncryptionResetScreen/View/EncryptionResetScreen.swift

@@ -19,6 +19,7 @@ struct EncryptionResetScreen: View {
                 context.send(viewAction: .reset)
             }
             .buttonStyle(.compound(.primary))
+            .accessibilityIdentifier(A11yIdentifiers.encryptionResetScreen.continueReset)
         }
         .background()
         .backgroundStyle(.compound.bgSubtleSecondary)