Fix emulator throwing error when .env created for first time.

Author: garg3133

package-lock.json

@@ -1,6 +1,6 @@
 {
   "name": "@nightwatch/mobile-helper",
-  "version": "0.1.2",
+  "version": "0.1.3",
   "description": "Easily setup all the requirements needed to get started with mobile-web testing using Nightwatch.",
   "main": "dist/index.js",
   "bin": "./index.js",

package.json

@@ -61,6 +61,9 @@ export class AndroidSetup {
     const sdkRootEnv = this.getSdkRootFromEnv();
     this.sdkRoot = sdkRootEnv || await this.getSdkRootFromUser();
 
+    const originalAndroidHome = process.env.ANDROID_HOME;
+    process.env.ANDROID_HOME = this.sdkRoot;
+
     const setupConfigs: SetupConfigs = await this.getSetupConfigs(this.options);
     Logger.log();
 
@@ -91,6 +94,8 @@ export class AndroidSetup {
       Logger.log(`${colors.bold('Note:')} Please make sure you have required browsers installed on your real-device before running tests.\n`);
     }
 
+    process.env.ANDROID_HOME = originalAndroidHome;
+
     if (!sdkRootEnv) {
       this.sdkRootEnvSetInstructions();
     }