Revert "Smooth out AwesomePlayer"

This reverts commit 1b78c4b1.

This reverts a Google change which added a new module called
clock estimator which interpolates the audio timestamps based
on audio and system time combined to make av sync logic more
linear. The change was never tested since Google deprecated
AwesomePlayer and moved to Nuplayer.

Change-Id: I1429cad1aa3341bf5f1add5ca6638e15e7e12897
CRs-Fixed: 712146