Bug: 18203577
The issue occurs as a result of performTraversals() both doing
a window relayout call *and* early-returning because it's not dirty.
To fix this pauseSurface() returns whether or not the RT-side is
"dirty" to force ViewRootImpl to do a draw even if mDirty is
otherwise empty.
Change-Id: I534f367e75d18d273ebf14df3927f5c464ef6bef
Bug: 15118640
* Prevent over-stuffing the queue by dropping frames
* Prevent double-drawing in one pulse by RT by deferring
vsync registration until post-draw so that it catches
the next vsync pulse instead of the current one
* Bias vsync race condition towards the UI thread
* Fix queueDelay to actually work
Change-Id: Ibf584258bd93ebcbba058bd976dc8b307f1c6155
