tenderloin: enable Qualcomm AV enhancements

Change-Id: Ie7206779989b59b220f09170f671a9e361ab07c8
tenderloin: let driver decide what composition to use

Change-Id: Ibac56b6d89ac596cd933296629bf62fb281a9d2a

Conflicts:

	system.prop
tenderloin: Set dynThreshold to 1.9 for hwcomposer

* Reduces jank during transitions

Change-Id: I1a44763ad091107ac4bb9132c37a7eaf34021539

Conflicts:

	full_tenderloin.mk