Add LambdaMessage to SurfaceFlinger

LambdaMessage allows for a cleaner, more compact way to create and
dispatch messages inside SurfaceFlinger. A follow up CL uses this
method, but it was isolated here to keep added functionality and
helper facilities separate.

Bug: 62215749
Test: Compile
Change-Id: I9e13e04f1b67fd60f01bcab02fe4f19c91c10bd4