Revert "Floating Windows : multitasking support"

This reverts commit 2f6717a230f1feeb927959df41d3601f6f7a361b.
Revert "Floating Window : make windows moveable and scaleable [WIP]"

This reverts commit 01e57564bb2cd58c44cd45a4f25cd08b23e868fe.
Revert "Bubble: Integrate with gesture SlideLayer (WIP)"

This reverts commit 20868d20966f7a9d52065df37ca15d0a8bb8d2d9.
Revert "Patch SysUI force close in Heads Up"

This reverts commit 67e722a8e9e276b58a11535c9efc82a7cb0cab7f.