Add missed Android usage hint

ycherniavskyi · ycherniavskyi · commit b8416c9d2728 · 2020-04-01T20:28:49.000+03:00
diff --git a/README.md b/README.md
@@ -55,6 +55,8 @@ android {
 }
 ```
 
+If necessary, in the same `build.gradle` you will need to increase `minSdkVersion` of `defaultConfig` up to `18` (currently default Flutter generator set it to `16`).
+
 ## Contributing
 The project is inseparable from the contributors of the community.
 - [CloudWebRTC](https://github.com/cloudwebrtc) - Original Author

Original file line number	Diff line number	Diff line change
`@@ -55,6 +55,8 @@ android {`
`55`	`55`	`}`
`56`	`56`	```
`57`	`57`
	`58`	+If necessary, in the same `build.gradle` you will need to increase `minSdkVersion` of `defaultConfig` up to `18` (currently default Flutter generator set it to `16`).
	`59`	`+`
`58`	`60`	`## Contributing`
`59`	`61`	`The project is inseparable from the contributors of the community.`
`60`	`62`	`- [CloudWebRTC](https://github.com/cloudwebrtc) - Original Author`