Merge cherrypicks of [15617994, 15618969, 15618970, 15617995, 15618032, 15618033, 15618190, 15620097, 15618565, 15620098, 15617967, 15619902, 15620257, 15619392] into sc-release

Change-Id: I3b705fb2e745ef1256b12fa4284723046511e597
tree: f9a53d6a0137d05c0c68decf49697d5d247fe2a3
  1. camera2/
  2. common/
  3. framesequence/
  4. photoviewer/
  5. widget/
  6. CleanSpec.mk
  7. OWNERS