Supporting multi-display for takeScreenshot() on master

Based on the change of this patch, ag/10633571,
Convert ScreenshotGraphicBuffer to ScreenshotHardwareBuffer, on
master branch only, re-porting this CL, ag/10700743, from rvc-dev
to master.

Bug: 153398112
Test: a11y CTS & unit tests
Change-Id: Iee1ed715f8912569c8db4a7297ee5ef4990e9e70