Revert "Set parent for WindowProcessController"

This reverts commit 33ab86910e9090d10dd91d760d2dc53e1f3e99e6.

Reason for revert: b/132986140
Bug: 132986140
Bug: 131915789
Change-Id: I75824cd02d4c6a557c6997ebca01354155f8cd93
3 files changed