Fix layout issue after insets changed

Fix a regression where a change in insets would forceLayout on the
view hierarchy but not run the measure/layout as a result. This would
cause layout requests to become stalled until a window-level relayout
event.

Bug 29634368

Change-Id: Ia3f32f5891c8b32c06c13f95ebd0572233572b04
1 file changed