Initialize screen state earlier in the boot process.

The system depends on receiving reliable vsync signals from
surface flinger during the boot process.  If it doesn't get them
because the screen is off then a hang may occur.

This isn't a problem when surface flinger manages the screen
blanking itself but it is a problem for devices that still
rely on early-suspend.  When early-suspend is involved, the
screen may be off without surface flinger knowing.  This is a
problem because surface flinger will only synthesize fake
vsyncs when it knows the screen is off, otherwise relying
on the hardware to generate vsync signals itself.  Unfortunately,
the hardware won't generate vsync signals if the screen was
turned off by early-suspend, so we have a problem.

Bug: 6975688
Change-Id: Iaf4527f716bf4ea72cc3e6fdaf060855697b02f2