Remove getter from PSBV animation method for dimming under the shade

Since we require a reboot to process high end graphics toggle on low end devices
there's no need to use a getter.  This method is processed a metric shit-ton of times
expanding/collapsing the shade.

PS2: missed a reference to isHighEndGfx()

Change-Id: Icf5af809e26fe79692c6185b51cc71deeb0aadde