Stop the tile grid from automatically reflowing during a resizing movement.

This avoids the situation of a large tile moving up a row while being resized. The reflow will happen at the end of the resizing movement.

Flag: com.android.systemui.qs_ui_refactor_compose_fragment
Test: MutableSelectionStateTest
Test: ResizingTest
Bug: 350984160

Change-Id: I0108663c7f3e4b13b215a2f9afb264d66ccda922