Revert "Revert "1/ Create display content window controller to position stacks in the display""

This reverts commit 7ef6d3371842748eebc3361eedc2dd492b39cfad.

Reason for revert: Testing relanding changes with ag/3515280

Change-Id: I44c9dcd3c68f05d57ffb47c63c08a30279bb5b22
7 files changed