pixel-sepolicy: pixelstats: add /proc/vendor_mm/*

add /proc/vendor_mm/* for MM Metrics query.

Bug: 299190787
Test: local test: no related avc denied in dmesg and logcat logs

Change-Id: I1a11b7d07d4775f425179073eaa0cb274738188f
Signed-off-by: Robin Hsu <robinhsu@google.com>
diff --git a/pixelstats/genfs_contexts b/pixelstats/genfs_contexts
index 8eee8bb..5146b85 100644
--- a/pixelstats/genfs_contexts
+++ b/pixelstats/genfs_contexts
@@ -1,2 +1,3 @@
 genfscon debugfs /physical-memory-group-manager                          u:object_r:debugfs_mgm:s0
 genfscon sysfs /kernel/pixel_stat                                        u:object_r:sysfs_pixel_stat:s0
+genfscon proc  /vendor_mm                                                u:object_r:proc_vendor_mm:s0