Add unit tests for MeasurementList methods

Test assign_to_target_shapes and _assign_unique_finger_ids methods

BUG=b:148627899
TEST=presubmit passes

Change-Id: Ib17595fcee2a93cef8b2d247e002f895761ac486
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/optofidelity_TPPT_analysis/+/2873859
Reviewed-by: Harry Cutts <[email protected]>
Commit-Queue: Sean O'Brien <[email protected]>
Tested-by: Sean O'Brien <[email protected]>
4 files changed