libprocessgroup: Convert libprocessgroup_util to static library

To avoid duplicate symbol linker error and prep for addition of json
descriptor reading and activation functions in upcoming changes.

Bug: 349105928
Test: m
Change-Id: I5cd663d6007ef330b872b8cf8ed046ee68b6d736
diff --git a/libprocessgroup/Android.bp b/libprocessgroup/Android.bp
index 33e00bc..a60bfe9 100644
--- a/libprocessgroup/Android.bp
+++ b/libprocessgroup/Android.bp
@@ -79,12 +79,12 @@
     ],
     static_libs: [
         "libjsoncpp",
+        "libprocessgroup_util",
     ],
     // for cutils/android_filesystem_config.h
     header_libs: [
         "libcutils_headers",
         "libprocessgroup_headers",
-        "libprocessgroup_util",
     ],
     export_include_dirs: ["include"],
     export_header_lib_headers: [