Add a debug log for tests that aren't eligible for the roboleaf mode.

This helps to figure out why atest gracefully fell back to standard
atest for command lines that have more than 1 test target.

Test: m atest && atest-dev adbd_test foo_test

Change-Id: I59d4e1dfd6cf3ef03cd526b4d7ceda9d59a87a36
1 file changed