Merge "Add unit tests for tools/compare_cts_reports/compare_cts_reports.py." into main am: a2ab7d5522

Original change: https://android-review.googlesource.com/c/platform/development/+/2758673

Change-Id: I747990190f939f116110ce0dba532f0c98a75297
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>