Disable triple buffers in SurfaceFlinger and HWcomposer.

reduce memory footprint of display pipeline

Bug: 16980264
Change-Id: If534f053b55edf700ed143f35f4d203d943ce26d
diff --git a/BoardConfig.mk b/BoardConfig.mk
index d8fd12e..106de07 100644
--- a/BoardConfig.mk
+++ b/BoardConfig.mk
@@ -45,7 +45,8 @@
 TARGET_BOOTLOADER_BOARD_NAME := flounder
 
 USE_OPENGL_RENDERER := true
-NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3
+NUM_FRAMEBUFFER_SURFACE_BUFFERS := 2
+BOARD_DISABLE_TRIPLE_BUFFERED_DISPLAY_SURFACES := true
 
 TARGET_USERIMAGES_USE_EXT4 := true
 BOARD_SYSTEMIMAGE_PARTITION_SIZE := 1342177280