Add deadline histograms into timestats

* SF deadline histogram
* Present time jitter histogram
* app deadline histogram

Histograms are only incremented if the associated (actual - predicted)
deltas are positive and jank is reported by the timeline.

Bug: 178003475
Test: builds, boots
Change-Id: Ic348cf9f2ed8d4e30bd0b26835cc0abf22cedfb2