Merge "Add some updates to documentation regarding concurrent camera operation." into rvc-dev am: 416e3d94f9 am: 0bd046e46d am: 3c6f024e7e

Original change: https://googleplex-android-review.googlesource.com/c/platform/hardware/interfaces/+/11832204

Change-Id: I54a6aaee43216dcb017d1a64070286c1cd435e7f