Refactor ConsumerBase and it's derived classes.

Move setDefaultBufferSize, setDefaultBufferFormat, and
setDefaultBufferDataSpace into ConsumerBase and remove them from
CpuConsumer and BufferItemConsumer.

Bug: 19977701

Change-Id: Ic68992464c5da6da7a41c4063a53029a69efcd1b
(cherry picked from commit 847f11e215e86b107ab50c1359fc7bc3cd7a3a11)
6 files changed