Add mobile testing resources (#15)

Author: sanesai

docs/tech/mobile.md

@@ -4,6 +4,14 @@
 
 - [Android Automation using Appium with Framework Design](https://www.youtube.com/watch?v=YSFznsn2lLk&list=PL9ok7C7Yn9A9qy5rqMiFtGHPbwM9yOxCW)
 
+## On Espresso (Android)
+
+- [Getting Started with Espresso : Android UI Automation](https://www.browserstack.com/guide/espresso-android-testing)
+
+## On XCUITest (iOS)
+
+- [Getting Started with XCUITest : UI Automation Framework on iOS](https://www.browserstack.com/guide/getting-started-xcuitest-framework)
+
 ## On Mobile Security
 
 Here are some resources that can be helpful for someone starting on Mobile Security Testing
@@ -14,3 +22,4 @@ Here are some resources that can be helpful for someone starting on Mobile Secur
 - [MacacaJS](https://macacajs.com/) : Automation made simpler for mobile apps
 - [UI Automator](https://www.tutorialspoint.com/android/android_ui_testing.htm)
 - [EarlGrey](https://developers.googleblog.com/2016/02/earlgrey-ios-functional-ui-testing.html)
+- [scrcpy](https://github.com/Genymobile/scrcpy) : Display and control your Android device