Calculating jank from the timestamps.

The reference benchmark was too heavy so instead the primitive benchmark
is being run with the smallest workload. A thread then queries the
timestamps from the device and calculates the jank.

Also switched the host side test away from UI automator as it was no
longer needed.

Change-Id: Ibe6e34b5815f67bd51ef303bba8ac265cd04af10
20 files changed