Merge "swapchain: always return a signle image for shared presentation mode"...

Merge "swapchain: always return a signle image for shared presentation mode" into sc-qpr1-dev am: 1f251f13 am: 78540c2c am: f254573d

Original change: https://googleplex-android-review.googlesource.com/c/platform/frameworks/native/+/15686506

Change-Id: Id720a5d737840bb7c4652f6e9ee095bafafe5ab7