b1c1: explicit vendor app access to cgroup

The set of vendor apps touching cgroup is from go/sedenials.

Bug: 110043362
Test: build with aosp/788639, boot blueline without cgroup denials/audit
messages.
Change-Id: Ifb5e6024e249868e0a6db5430db9a076e40f23c7
diff --git a/vendor/qcom/common/ssr_detector.te b/vendor/qcom/common/ssr_detector.te
index a5ffd3b..0fd4cc7 100644
--- a/vendor/qcom/common/ssr_detector.te
+++ b/vendor/qcom/common/ssr_detector.te
@@ -19,3 +19,5 @@
 allow ssr_detector_app sysfs:lnk_file r_file_perms;
 
 r_dir_file(ssr_detector_app, sysfs_msm_subsys)
+
+allow ssr_detector_app cgroup:file w_file_perms;