[BUG] Build and Run fails if adb is not installed and found in terminal

[kidsonfilms-python-rules]

Describe the bug
If adb is not installed, the Build and Run command will fail, while not crashing or any fatal error

To Reproduce
Steps to reproduce the behavior:

1. Have an environment without adb installed
2. Attempt a Build and Run

Expected behavior
Show the user a VS Code Error Message and tell them to configure "Do not use adb" in settings (soon-to-add)

Screenshots
Not applicable

Enviroment (please complete the following information):

• OS: All
• VSCode Version: All
• Extension Version: 1.1.0

Additional context
This is a code-known bug linked to PR #4. Do not release new version without fix