Update configuration of all visible activities in a stack when resizing

Previously we were only updating configuration for the top activity in
the stack during resizing. This caused an activity behind the top
translucent activity to continue to display in the old configuration
and also get relaunched without window preservation when the top
translucent activity is finished.
We now make sure all activities at all below a translucent activity
have their configuration updated during resizing.

Bug: 28762547
Change-Id: I0926ac6db088cdf3f6a225c552dbfbe944830f68