Merge "identity: Add multi-document presentation support." am: 2e182eaf1a am: 0e7c06f8f4 am: 86b0e740e7 am: 77e54da1da

Original change: https://android-review.googlesource.com/c/platform/hardware/interfaces/+/1824772

Change-Id: I50729a1e8f29cc71966cda82092635a6c652186f