Camera2: Handle (0, 0) size for deferred OutputConfiguration

We need to handle below sequence of events:
1. OutputConfiguration(Size(0, 0), klass)
2. addSurface(surface)
3. createCameraCaptureSession

In this case, allow the addSurface() to succeed.

Test: camera works in keep/hangouts/contacts
Bug: 34697112
Change-Id: I726c60cce9a11c69b050aad47f4ed4a0a7a0870e