Camera: Allow reprocessing session to configure physical streams

Do not disallow reprocessable session to use physical streams.

At the same time, we cannot claim reprocessing to/from physical streams
work because:
1. It's undefined behavior to reprocess an input buffer into a physical
stream of different physical camera, or an input physical stream buffer
into an output buffer of different physical camera.
2. If the reprocessing input buffer comes from different physical cameras
with different sizes, because the current HAL API doesn't support sending
different size buffers through input stream, there isn't a
non-vendor-specific solution available.

Bug: 157123506
Test: vendor testing
Change-Id: I1ccf2b3918c1cb475b1baec10d35c6785b25208d