Fix ViewRoot inset adjustment after initial setup.

If the insets change, "mWidth/mHeight" won't change
as it's based on the window frame (not the surface size),
we need to track when the insets change and call
HardwareRenderer.setup with the new values.

Bug: 28257246
Bug: 28368990
Change-Id: Ida304b57c4671d010d1cf7b370674c9453841c97