If you haven't already, you'll need to download the Command Line Tools for Android apps.
If you unzip the command line tools to a known location, the blackberry-deploy
command is located in;
<unzip location>\blackberry.tools.SDK\bin
(Windows)
or
<unzip location>/blackberry.tools.SDK/bin
(Mac)
(the command itself is included in multiple SDKs, but you seem to currently be working with Android)