On Windows, only four applications can use DXGI duplication APIs concurrently.
So this change adds a reference counter of DxgiDuplicatorController to unload
DXGI components when the reference counter reaches 0.
BUG=webrtc:7808
Review-Url: https://codereview.webrtc.org/2933893003
Cr-Commit-Position: refs/heads/master@{#18668}