update resources to better fit the screen

Author: jonnyzzz

Targeting iOS and Android with Kotlin Multiplatform/01_Introduction.md

@@ -21,7 +21,7 @@ this provides. While we'll be demonstrating this with a simple application, what
 The common code is `"Kotlin Rocks on ${platformName()}"`, where `platformName()` is 
 a function that is declared using the `expect` keyword. The `actual` implementation will be specific to the platform.
 
-![Emulator App](./assets/iPhone-emulator-kotlin-rocks.png) ![Emulator App](./assets/android-emulator-kotlin-rocks-android.png)
+![Emulator and Simulator](./assets/androd-and-ios.png)
 
 
 # Setting Up the Local Environment

Targeting iOS and Android with Kotlin Multiplatform/02_CreatingAndroidApp.md

@@ -19,3 +19,5 @@ The `step-002` branch of the
 repository contains a possible solution for the tasks that we have done above. We can also download the
 [archive](https://github.com/kotlin-hands-on/mpp-ios-android/archive/step-002.zip) from GitHub directly or
 check out the repository and select the branch.
+
+![Emulator with App](./assets/android-emulator-hello-app.png)