sm6250-common: set stock configstore flags as props

  /sbin # ./configstore-dump
  TARGET_HAS_WIDE_COLOR_DISPLAY := true
  TARGET_HAS_HDR_DISPLAY := true
  TARGET_FORCE_HWC_FOR_VIRTUAL_DISPLAYS := true
  MAX_VIRTUAL_DISPLAY_DIMENSION := 4096
  NUM_FRAMEBUFFER_SURFACE_BUFFERS := 3

system.prop

@@ -27,6 +27,11 @@ debug.sf.disable_backpressure=1
 debug.sf.enable_hwc_vds=1
 debug.sf.latch_unsignaled=1
 ro.opengles.version=196610
+ro.surface_flinger.force_hwc_copy_for_virtual_displays=true
+ro.surface_flinger.has_wide_color_display=true
+ro.surface_flinger.has_HDR_display=true
+ro.surface_flinger.max_frame_buffer_acquired_buffers=3
+ro.surface_flinger.max_virtual_display_dimension=4096
 ro.vendor.display.cabl=0
 ro.vendor.display.sensortype=2
 ro.vendor.display.svi=1