Revert "Decouple systemui shared componements from PipController..."

Revert "Decouple systemui shared componements from PipController..."

Revert submission 12500984-WM-Shell-PIP-migration-8

Reason for revert: Suspect for b/168701961
Reverted Changes:
Ib41f203f2:Decouple systemui shared componements from PipCont...
I4862508a6:Decouple systemui shared componements from PipCont...

Exempt-From-Owner-Approval: Revert to address a P0
Change-Id: I8ef9840610ec8dd8a65c14c617b7ba190cec277d