Fix for sendkeys with Selendroid in CHROMIUM context
Add warning about localhost in Selenium Node config.

Using `127.0.0.1` for Appium's Selenium Grid node config makes the grid
server unable to contact Appium when located on a different host.
Clarified that in the docs.
Merge pull request #3786 from emakiej/selendroid_sendkeys

Fix for sendkeys with Selendroid in CHROMIUM context
Merge pull request #3797 from DylanLacey/master

Add warning about localhost in Selenium Node config.
update appium-uiauto with findElements exclusivity fix