Update configuration before setting override size.

PhoneWindowManager.setInitialDisplaySize() uses Resources to determine
the height of the Status and Navigation bars. Previous to this CL the
Configuration was being updated after setInitialDisplaySize() was
called which caused the Status and Navigation Bar heights to use the
initial size and density and not the override values. This fix moves
the updateConfiguration after the override values are read in but
before setInitialDisplaySize() is called.

Fixes bug 9966940.

Change-Id: If5b033f520e14f32080d0f2aebbdc6bdae714f88