Merge "Add a flag to virtual display to indicates that content on this display...

Merge "Add a flag to virtual display to indicates that content on this display need to be destroyed once the display is removed. Then apply this flag to VR virtual display." into oc-mr1-dev am: 27378c64
am: 25b10938

Change-Id: I0e2a64a72a9bbc14a1e8ef3a8b217d71b5eafb37