* am/ectx: Implement SetRequestExitToLibraryAppletAtExecuteNextProgramEnabled and add service placeholder
This PR implements `am` service call `SetRequestExitToLibraryAppletAtExecuteNextProgramEnabled` (closes#2028) accordingly to RE and adds placeholder for the `ectx` service. Both were added in 11.0.0+ firmware and are needed to boots games which needs this version.
Some games are now playable/bootable:
* Remove unused warning
