Use virtual screen size to determine lowmemorykiller tuning

Use the virtual screen resolution returned by getBaseDisplaySize
instead of the physical screen resolution returned by
getInitialDisplaySize.  The memory required by apps will scale
with graphics buffer size, which are generally relative to the
virtual screen resolution.

Change-Id: I0476e4afad99eca2f4f56042a8dbef5b3c7889db
1 file changed