Set ro.sf.lcd_density

BUG: 77581055
Test: Local build & getprop
Change-Id: Id7cb74022fd6f81ae0d4954712719608aac772da
diff --git a/host/commands/launch/main.cc b/host/commands/launch/main.cc
index eb172b5..19bc897 100644
--- a/host/commands/launch/main.cc
+++ b/host/commands/launch/main.cc
@@ -65,6 +65,7 @@
              "The size of the blank data image to generate, MB.");
 DEFINE_string(blank_data_image_fmt, "ext4",
               "The fs format for the blank data image. Used with mkfs.");
+DECLARE_int32(dpi);
 DEFINE_bool(disable_app_armor_security, false,
             "Disable AppArmor security in libvirt. For debug only.");
 DEFINE_bool(disable_dac_security, false,
@@ -406,6 +407,7 @@
   cmdline << t.rdbuf();
   t.close();
   cmdline << " androidboot.serialno=" << FLAGS_serial_number;
+  cmdline << " androidboot.lcd_density=" << FLAGS_dpi;
   if (FLAGS_extra_kernel_command_line.size()) {
     cmdline << " " << FLAGS_extra_kernel_command_line;
   }