Revert to using task windowing mode for caption type check

Using repository state can fail in fullscreen->freeform transitions if
onTaskInfoChanged relayouts are faster than the transition relayout
because the repository would still see the task as not desktop (and
set asyncViewHost=true but would see the task as freeform (and set
applyStartTransactionOnDraw=true), which are incompatible params.

This change just reverts to what windowdecor1 used.

Flag: com.android.window.flags.enable_window_decoration_refactor
Bug: 432321262
Test: move task from fullscreen->desktop, no crash
Change-Id: I79d5888f6557026636c52a2769790f9bd1883882