I was getting the message
> Installation failed with message Failed to establish session.
so following some responses to the problem I
that file-system has no space:
java.io.IOException: Requested internal only, but not enough space.
the issue is:
android:installLocation="internalOnly"
either remove it, or replace it with:
android:installLocation="preferExternal"
or make some space on the device / emulator by uninstalled or deleting something -
or simply assign some more megabytes to the virtual SD card.