11315 Do not add null task observers

11330 Remove engine hash from the output artifact

11355 update sim script

11356 Remove engine hash from pom filename

11361 Include Java stack trace in method channel invocations

11367 Make message loop task entry containers thread safe

11368 Switch to an incremental runloop for GLFW

11374 Update scenarios readme

11382 Trivial: remove empty line in the pom file

11384 Account for root surface transformation on the surfaces managed by the external view embedder.

11388 Allow overriding the GLFW pixel ratio

11392 Wire up software rendering in the test compositor.