Bug 1092978 - [WIP] add a PVsyncEvent sub-protocol in PBackground for cross process refresh driver vsync event.
[Silk] wip, vsync-aligned refresh driver
[Silk] wip, get vsync rate from HwcComposer2D
[Silk] wip, PlatformVsyncTimer
VsyncDispatcherTrace systrace tool
turn on vsync-aligned refresh driver
debug