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

android/Android.bp

@@ -39,7 +39,6 @@ bootstrap_go_package {
         "arch_module_context.go",
         "base_module_context.go",
         "build_prop.go",
-        "buildinfo_prop.go",
         "compliance_metadata.go",
         "config.go",
         "container.go",