libprocessgroup: Deliberately leak TaskProfiles and CgroupMap instances.

This avoids a race between destruction on process exit and concurrent
access from another thread.

Bug: 129023204
Change-Id: Iecafa67a78e2cce53687156e7f91547b4a23ec13
diff --git a/libprocessgroup/cgroup_map.cpp b/libprocessgroup/cgroup_map.cpp
index 9951621..b3b497f 100644
--- a/libprocessgroup/cgroup_map.cpp
+++ b/libprocessgroup/cgroup_map.cpp
@@ -336,8 +336,10 @@
 }
 
 CgroupMap& CgroupMap::GetInstance() {
-    static CgroupMap instance;
-    return instance;
+    // Deliberately leak this object to avoid a race between destruction on
+    // process exit and concurrent access from another thread.
+    static auto* instance = new CgroupMap;
+    return *instance;
 }
 
 bool CgroupMap::LoadRcFile() {