Detect surface resizes

HardwareRenderer normally relies on the window manager to be notified of
surface dimension changes. It is however possible to execute a drawing pass
before receiving the window manager notification. We must therefore compare
the actual size of the target surface to the window size and perform a full
redraw when they are not the same.

Change-Id: Idccc8592f3f777edee1ef67a98a4c2a825dcfba7