Adjust clock element size when bounds change

While compose measures the appropriate view size, it doesn't recompose
when the size of the underlying view changes. In order to signal to
compose that it should recalculate the positions of views, we hook into
the existing flow that tracks the size of the clock and use it to size
the compose element directly. This is only enforced as a minimum size to
avoid wrapping issues when the flow is at it's default value during
first composition, or in case it becomes out of sync for a frame.

This change also attempts to opportunistically fix a non-flexi bug, as
I'm dividing the two clock bounds flows for flexiglass anyway. There is
a latent edge-case where smartspace is incorrectly positioned for small
clock because it is being placed based on the measurements of the large
clock if a pending update to the isLargeClock flow is delayed and is
desynchronized from the onClockBoundsChanged flow. This potential issue
could be the root cause of b/436274234 but it has been difficult to
confirm since I haven't been able to isolate a reproduction.

Bug: 436274234
Bug: 438470065
Flag: com.android.systemui.scene_container
Test: Checked that date / weather / alarms animates
Change-Id: I96f7b7335f18c5adbb4ac7d2638b5e921a3dd440