* Echo client (over IP) in Android demo app.

1. Adding the JNI bridge for ChipDeviceController
2. Adding a screen to take in the IP address of the CHIP device and 
message to echo

Demo: 
https://drive.google.com/file/d/15jIrB8Cz6k9MNixhhdeJEAWj6fmNCAJR/view



* Restyled by google-java-format

* Restyled by clang-format

* Adding documentation.

Co-authored-by: Restyled.io <commits@restyled.io>