test(jet): check device before attempting to use it

this method is called after cleanup during lifecycle finish of tests, with
an empty device. cleanup was not called prior so this bug wasn't evident

Author: mikehardy

tests/patches/jet+0.6.6-0.patch

@@ -0,0 +1,14 @@
+diff --git a/node_modules/jet/lib/node/patch/detox.js b/node_modules/jet/lib/node/patch/detox.js
+index fdca559..9092118 100644
+--- a/node_modules/jet/lib/node/patch/detox.js
++++ b/node_modules/jet/lib/node/patch/detox.js
+@@ -28,6 +28,9 @@ if (detox) {
+       // device.reloadReactNative({ ... })
+       // todo detoxOriginalReloadReactNative currently broken it seems
+       // const detoxOriginalReloadReactNative = originalDevice.reloadReactNative.bind(originalDevice);
++      if (!originalDevice) {
++        return undefined;
++      }
+       originalDevice.reloadReactNative = async () => {
+         ready.reset();
+         global.jet.reload();