[SysUI][Floaty] Add basic composable to draw squeeze effect later

* Adds a basic composable to draw squeeze effect in later CLs
* Adds logic for attaching this composable to a new root window

Bug: 399263897
Flag: com.android.systemui.shared.enable_lpp_squeeze_effect
Change-Id: I6d3c953d6493b64f247eb5b6e6a754d0a472baf9