Added unit tests for optimization_atom_matcher_map flag am: 5e81a7c7cf

Original change: https://android-review.googlesource.com/c/platform/packages/modules/StatsD/+/2107856

Change-Id: Ic0e6de12ffaf7ee319072fe5116c8316f75f8811
Signed-off-by: Automerger Merge Worker <[email protected]>