AHardwareBuffer requests to handle android fences. There are 2 type of fences, release fence and acquire fence. Some ideas were borrowed from b2g's FenceHandle implementation.
The release fence is a fence that is used for waiting until usage/composite of AHardwareBuffer is ended. It needs to be delivered from host side to client side. It is delivered via ImageBridge, since some TextureClientd str recycled without recycle callback.
The acquire fence is a fence that is used for waiting until rendering to its AHardwareBuffer is completed. It is delivered from client side to host side.
Differential Revision: https://phabricator.services.mozilla.com/D87298
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