Revert "Add WindowDecorViewHost and WindowDecorViewHostSupplier"

Revert submission 28895752-windowdecor-viewhost

Reason for revert: b/366734118

Reverted changes: /q/submissionid:28895752-windowdecor-viewhost

Change-Id: I7087a89acbb0c5e48bd73e1aef364e90673f021c
14 files changed