flounder: switch tegra compositor to glcomposer

Switch tegra compositor to glcomposer, from generic default.
For transitions which exceed display overlay count and/or
when force composition is needed, glcomposer should give
better performance than surfaceflinger.

Change-Id: I91328255221e9aceb62be059fca320ffb783424a

Conflicts:
	device.mk
diff --git a/device.mk b/device.mk
index d8cbb0e..f37ea5e 100644
--- a/device.mk
+++ b/device.mk
@@ -200,7 +200,8 @@
     ro.hwui.disable_scissor_opt=true \
     ro.bt.bdaddr_path=/sys/module/flounder_bdaddress/parameters/bdaddress \
     ro.frp.pst=/dev/block/platform/sdhci-tegra.3/by-name/PST \
-    ro.ril.def.agps.mode=1
+    ro.ril.def.agps.mode=1 \
+    persist.tegra.compositor=glcomposer
 
 # setup dalvik vm configs.
 $(call inherit-product, frameworks/native/build/tablet-10in-xhdpi-2048-dalvik-heap.mk)