Camera2: create new streams if surface size has changed

When a new capture session is created, the old streams
are re-used if same surface and rotation. However, if the
surface has changed size, we must re-create the stream
to ensure HAL is configured properly, which includes
setting up proper sensor resolution.

This is an issue in e.g. CTS testNoiseReductionModes
and testEdgeModeControl, where a new preview with different
size can be setup without first stopping the previous one.
The same preview surface is used here, but with changed size.

Change-Id: I3b88a95209e83cf1cef0f4d1f791c87b0feb093f
Signed-off-by: Mikael Persson <mikael.persson@intel.com>
Signed-off-by: Zhiquan Liu <zhiquan.liu@intel.com>