SF: always preallocate the client composition buffers

We have seen that allocating a GraphicBuffer on the first use
of client composition contributes to jank. To prevent that we
pre-allocate all the needed buffers when we setup the DisplayDevice.

Bug: 191633152
Test: observe logs that pre-allocation happened.
Change-Id: Ia10e023e5c91e6fd94906b90044dd9378d01051c