Prevent size jumps during interruptions

This CL adds the same kind of interruption support for the size of
elements that was added in ag/26597678. The main difference is that this
support unfortunately does not always work given that the element might
have already been measured when processing the interruption delta,
preventing us from re-measuring it again with the delta taken into
account.

See b/290930950#comment22 for more details.

Bug: 290930950
Test: ElementTest
Flag: com.android.systemui.scene_container
Change-Id: I7498f56ac9598abf931a121d43353d66935fd8fb