Reapply "libprocessgroup: Remove cgroup.rc file"

This reverts commit 972a2d30f8a3f260967b747592f4e8cdc560e01c.

Change-Id: Icdf2824675e515ea3656b1c58ac55160ecc337df
diff --git a/libprocessgroup/Android.bp b/libprocessgroup/Android.bp
index a60bfe9..d623a11 100644
--- a/libprocessgroup/Android.bp
+++ b/libprocessgroup/Android.bp
@@ -17,7 +17,7 @@
 
 libprocessgroup_flag_aware_cc_defaults {
     name: "libprocessgroup_build_flags_cc",
-    cpp_std: "gnu++20",
+    cpp_std: "gnu++23",
     soong_config_variables: {
         memcg_v2_force_enabled: {
             cflags: [
@@ -116,5 +116,6 @@
     ],
     static_libs: [
         "libgmock",
+        "libprocessgroup_util",
     ],
 }