libprocessgroup: fix task_profile_test to correctly detect cgroup v2

Use correct attribute of the mntent to check for cgroup v2 entry.

Bug: 277233783
Change-Id: Ie34b89b610117b8ce043f2f18947273d75618fef
Signed-off-by: Suren Baghdasaryan <surenb@google.com>

libprocessgroup/task_profiles_test.cpp

@@ -43,7 +43,7 @@ bool IsCgroupV2Mounted() {
     }
     struct mntent* mnt;
     while ((mnt = getmntent(mnts.get()))) {
-        if (strcmp(mnt->mnt_fsname, "cgroup2") == 0) {
+        if (strcmp(mnt->mnt_type, "cgroup2") == 0) {
             return true;
         }
     }