Here is my AndroidStudio .desktop file which works from the launcher.
If you are unable to create an entry for Android Studio on the Unity launcher through the Tools > Create Desktop Entry... option, it is possible that you might have a Unity generated
jetbrains-android-studio.desktop in your
~/.local/share/applications folder. To confirm, open the file and check for the following entry:
Delete the file and try again.
Alternatively, you can also open Android Studio, click on Configure -> Create Desktop Entry. This should create an entry on the dash: