Use Soong-built system/build.prop

buildinfo.prop is also removed since it's now obsolete.

Bug: 322090587
Test: boot
Test: compare build.prop before and after
Change-Id: Ida7bab82add6e86e1076061a5fcdb572cedd1578

scripts/Android.bp

@@ -305,12 +305,6 @@ python_binary_host {
     srcs: ["gen_build_prop.py"],
 }
 
-python_binary_host {
-    name: "buildinfo",
-    main: "buildinfo.py",
-    srcs: ["buildinfo.py"],
-}
-
 python_binary_host {
     name: "extra_install_zips_file_list",
     main: "extra_install_zips_file_list.py",