Revert "[RESTRICT AUTOMERGE] Associate SystemUiContext with DisplayContent"

This reverts commit 71b2172abc534e43a842e5834b0cf6636e0a63c3.

Reason for revert: See b/205859784, breaks launcher tests
Bug: 205859784
Bug: 194262507
Bug: 191064581

Change-Id: Iaac32bd4142c0539300725dc2f6e4255fefc8b2f
13 files changed