libprocessgroup: adopt cgroup v2 freezer search path
With the new uid/pid hierarchy the search path looks into uid_0, which
is always present.
Bug: 168907513
Test: verified that the cgroup v2 hierarchy works correctly in normal
mode
Test: verified that the cgroup v2 hierarchy works correctly in recovery
mode
Change-Id: If33594e4891128148da64bed47e68fa74667013d
diff --git a/libprocessgroup/include/processgroup/processgroup.h b/libprocessgroup/include/processgroup/processgroup.h
index 1cadc9f..1aaed7b 100644
--- a/libprocessgroup/include/processgroup/processgroup.h
+++ b/libprocessgroup/include/processgroup/processgroup.h
@@ -36,7 +36,8 @@
static constexpr const char* CGROUPS_RC_PATH = "/dev/cgroup_info/cgroup.rc";
// Path to test against for freezer support
-static constexpr const char* CGROUP_FREEZE_PATH = "/sys/fs/cgroup/freezer/cgroup.freeze";
+// TODO: remove and replace with a function call, see http://b/180056337
+static constexpr const char* CGROUP_FREEZE_PATH = "/sys/fs/cgroup/uid_0/cgroup.freeze";
bool UsePerAppMemcg();