for emulator and real device, we have to install a SSO.apk to make our targeted app App.apk work proerply.
more details from "Sauce Labs Ticket 48689: query on android emulator"
For automated tests please use otherApps Appium capability to pre-install apps. This functionality was introduced in Appium 1.8.0
Refer to the following link for documentation on otherApps capability.
Note that while testing on Sauce otherApps capability only takes public or private URLs to the apps and not local paths.