davinci: Enable GL comp backpressure

Enable backpressure for client composition to avoid jank due to
HWC queue stuffing.

Bug: 146129613
Test: 1. Open Camera
      2. Swipe vertically to go back to home screen
      3. Measure the "FrameMissed" count from systrace result

Change-Id: Icd7a92bda5c874dd72d6da4ae991919cbc5b79b1

vendor.prop

@@ -117,7 +117,6 @@ debug.gralloc.enable_fb_ubwc=1
 debug.gralloc.gfx_ubwc_disable=0
 debug.hwui.renderer=opengl
 debug.mdpcomp.logs=0
-debug.sf.disable_backpressure=1
 debug.sf.early_phase_offset_ns=11600000
 debug.sf.early_app_phase_offset_ns=11600000
 debug.sf.early_gl_phase_offset_ns=3000000