sweet2: properties: Tune up a bit for smooth ui

Author: MySelly

properties/vendor.prop

@@ -56,7 +56,7 @@ ro.qcom.adreno.qgl.ShaderStorageImageExtendedFormats=0
 persist.mm.enable.prefetch=true
 
 # HWUI
-ro.hwui.render_ahead=3
+ro.hwui.render_ahead=1
 ro.hwui.drop_shadow_cache_size=6
 ro.hwui.gradient_cache_size=1
 ro.hwui.layer_cache_size=48
@@ -84,7 +84,7 @@ debug.sdm.support_writeback=0
 # Graphics
 ro.config.avoid_gfx_accel=true
 ro.surface_flinger.support_kernel_idle_timer=true
-debug.sf.enable_gl_backpressure=0
+debug.sf.enable_gl_backpressure=1
 
 # Performance
 debug.performance.tuning=1