[Build] Update README.md to add Android NDK prereq for mobile

README.md

@@ -40,13 +40,13 @@ Ask for help or report issues:
 
 1. [Git](https://git-scm.com/downloads) (recent version that includes LFS, or install [Git LFS](https://git-lfs.github.com/) separately).
 2. [Visual Studio 2017](https://www.visualstudio.com/downloads/) with the following workloads:
-  * .NET desktop development
+  * `.NET desktop development`
     * If your OS is Windows 10: add `.NET Framework 4.6.2 development tools` in optional components of `.NET desktop development`
     * If your OS is Windows 7: [.NET 4.6.2 Developer Pack](https://www.microsoft.com/net/download/thank-you/net462-developer-pack))
-  * Desktop development with C++
-  * .NET Core cross-platform development
-  * Optional (to target UWP): Universal Windows Platform development
-  * Optional (to target iOS/Android): Mobile development with .NET
+  * `Desktop development with C++`
+  * `.NET Core cross-platform development`
+  * Optional (to target UWP): `Universal Windows Platform development`
+  * Optional (to target iOS/Android): `Mobile development with .NET` and `Android NDK R13B+` individual component
 3. [FBX SDK 2019.0 VS2015](https://www.autodesk.com/developer-network/platform-technologies/fbx-sdk-2019-0)
 
 ### Build Xenko