powerhint: Set big core to group_cfs_skip_mask for sys group

sync from ag/27280353

Set big core to group_cfs_skip_mask for sys group when screen is off,
so that sys group tasks will run less in big core.

Bug: 342968374
Test: boot to home

Change-Id: I4456641e8e99c83573887c4a3b56ba484b490773

perf/powerhint-tegu.json

@@ -277,6 +277,16 @@
       ],
       "ResetOnInit": true
     },
+    {
+      "Name": "SysGroupCfsSkipMask",
+      "Path": "/proc/vendor_sched/groups/sys/group_cfs_skip_mask",
+      "Values": [
+        "0x0",
+        "0x80"
+      ],
+      "DefaultIndex": 0,
+      "ResetOnInit": true
+    },
     {
       "Name": "BGUClampMaxBoost",
       "Path": "/proc/vendor_sched/groups/bg/uclamp_max",
@@ -1276,6 +1286,12 @@
       "Duration": 0,
       "Value": "0"
     },
+    {
+      "PowerHint": "DISPLAY_INACTIVE",
+      "Node": "SysGroupCfsSkipMask",
+      "Duration": 0,
+      "Value": "0x80"
+    },
     {
       "PowerHint": "CAMERA_LAUNCH",
       "Node": "CPUSkipMask",