Missing 'key.properties' File

**Describe the bug**
After cloning the repo it fails to build android due to a missing 'key.properties' file. After creating that file and adding:
```
keyAlias=""
keyPassword=""
storeFile=""
storePassword=""
```
the project built successfully.

**To Reproduce**
Steps to reproduce the behavior:
1. Clone Project
2. Open in Android Studio or run `flutter run` in the directory
3. Observe that the build failed due to a path being null in the gradle.properites

**Expected behavior**
Be able to build project after cloning to local

**Desktop:**
- OS: OSX Mojave
- Browser N/A
- Version N/A

**Smartphone:**
- OS: Android