Force draw during a blast sync and disable rt animations

When ViewRootImpl is going to draw a frame due to a blast sync request,
we call forceDrawNextFrame to ensure we get a draw this vsync, even if
RT animation rendered a frame. This will ensure that we aren't required
to reschedule a draw either in rt thread or ui thread since we'll get a
frame back as long as there's an available buffer.

We also disable rt animations if a sync set has started with Syncer and
then re-enable when the sync set is complete. This ensures we don't
continue to acquire buffers for a render thread scheduled animation
during a UI animation since we want the UI request to get the buffer.

Test: Open internet dialog from notification shade on 60hz device
Fixes: 217621394
Bug: 200284684
Change-Id: Ic1534d21b0ee2ad82f20ff34df4cbbbad87557fd

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