am 31dfff78: am 5c12bc58: Merge remote-tracking branch...

am 31dfff78: am 5c12bc58: Merge remote-tracking branch \'goog/jb-mr1-lockscreen-dev\' into jb-mr1-dev

* commit '31dfff78':
  Fix content alpha
  Removed makeInvisible() function
  Making the reordering play nice with the 3D widget carousel
  Fixed misplacement of cancel(X) button for Face Unlock
  Fill in logic in WidgetPager to ignore music when reordering.
  Attempt to fix bug on devices where multi-user support is disabled.
  Implement correct music widget positioning in keyguard
  Render camera widget correctly after shell restart.
  Moving persistence calls to background.
  FUL uses square aspect ratio for all layouts fixes b/7426399
  Addressing a couple comments on previous CL
  Impose a height & width downward on challenge views.
  Fixing some regressions in tablet reordering/deleting.
  Disable lockscreen window anim when launching camera.