ITS: add do_3a() up front in test_auto_per_frame_control.py

Moved test from scene2_a to scene2_b to brighten center of image.
>3% metadata change, luma change in same direction
<1% metadata change, >3% luma change FAILs
Add debug flag that will run RAW captures also if available.
Summarize all fails after test has run.

bug: 111844407
bug: 112029344

Change-Id: Ife869be6b43dff8c1f210b560b060baa1c5127eb
3 files changed