libcompositionengine: Link against libprocessgroup_util

Not sure why libcompositionengine is linking against libprocessgroup
statically, but now that libprocessgroup_util is a static library
dependency of libprocessgroup, it is not linked against transitively,
so it needs to be included here.

Bug: 349105928
Test: m
Change-Id: Id49f1db65c79bccddf56d7b2ae9edec50e06c831
diff --git a/services/surfaceflinger/CompositionEngine/Android.bp b/services/surfaceflinger/CompositionEngine/Android.bp
index dad945c..05af4ed 100644
--- a/services/surfaceflinger/CompositionEngine/Android.bp
+++ b/services/surfaceflinger/CompositionEngine/Android.bp
@@ -49,6 +49,7 @@
         "libtonemap",
         "libaidlcommonsupport",
         "libprocessgroup",
+        "libprocessgroup_util",
         "libcgrouprc",
         "libjsoncpp",
         "libcgrouprc_format",