Update ViewRootImpl call to match new interface

The getRootMeasureSpec is taking the third params as the private flag to
deal with the case when a system bar window layout on the same side as
the display cutout. This case is not relevant for layoutlib, so this
simply passes 0.

Test: build
Bug: 203031262
Change-Id: Ie26fb2f5adeb385621abacc9f2779d0820094c02
1 file changed