Increase SPC threshold for little and mid cores for CAMERA_STREAMING_STANDARD

SPC threshold is too low for both Little and Mid cores. This CL increases this
threshold to 55 for Little Core and to 30 for Mid core.
Test results show lower framedrop rate in presence of background load,
without having a negative impact on the power.

Refer to ag/26943567

Bug: 335776541
Test: Build pass
Change-Id: I39d442f95215a7e72d093fd101fb4cc71840ba3d

powerhint-comet.json

@@ -623,6 +623,7 @@
       "Path": "/sys/devices/system/cpu/cpufreq/policy0/sched_pixel/spc_threshold",
       "Values": [
         "70",
+        "55",
         "42",
         "35",
         "30",
@@ -1965,7 +1966,7 @@
       "PowerHint": "CAMERA_STREAMING_STANDARD",
       "Node": "PMU_LIT_SPC_THRESHOLD",
       "Duration": 0,
-      "Value": "42"
+      "Value": "55"
     },
     {
       "PowerHint": "CAMERA_STREAMING_STANDARD",
@@ -1983,7 +1984,7 @@
       "PowerHint": "CAMERA_STREAMING_STANDARD",
       "Node": "PMU_MID_SPC_THRESHOLD",
       "Duration": 0,
-      "Value": "18"
+      "Value": "30"
     },
     {
       "PowerHint": "CAMERA_STREAMING_STANDARD",