missing essential plugin org.jetbrains.android mac code example

Example: Missing essential plugin: org.jetbrains.android

## Windows 10 ---
## Delete this file
C:\Users\YourUserName\AppData\Roaming\Google\AndroidStudioPreview4.X\disabled_plugins.txt

## Linux
rm -r ~/.config/Google/AndroidStudio4.1
## Or Remove
rm  ~/.config/Google/AndroidStudio4.1/disabled_plugins.txt