Relocate ExecutionBurst* classes to NN util code

The only changes when copying these files were .clang-format differences
and correcting a typo in a comment.

Bug: 177267324
Test: mma
Change-Id: I96cc2402642e1e3076ac7e78e06163c1d3d41701
Merged-In: I96cc2402642e1e3076ac7e78e06163c1d3d41701
(cherry picked from commit 87e83068784b65ab851e4ff65a1099de4e777c9e)
5 files changed