sim:tests: add shodan_stress robot script

Script to stress Cantrip and in particular the MemoryManager. To start
we sequentially run randomly selected applications.

Note this is mostly useful with a release build where there is limited
memory and the MemoryManager needs to constantly recycle resources.

Bug: 274954207

Change-Id: I06223856e0e652ce86416b70a9d1466a822bb9e1
1 file changed