Merge "Add some updates to documentation regarding concurrent camera operation." into rvc-dev am: 416e3d94 am: 0bd046e4 am: 7dd86106 am: 502ffab1

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

Change-Id: I927b5e6fadf8ec2f5792f2ddf99d40d25e638de1