powerhint: Raise minimum MIF frequency to 546 MHz during screen on

Test: Build and power measurement
Bug: 336872050
Flag: NONE powerhint change does not support flags
Change-Id: Ibb49621729f966a83bcbb77d611e0c0e78545805

perf/powerhint-tegu.json

@@ -32,7 +32,8 @@
         "1539000",
         "1352000",
         "1014000",
-        "0"
+        "421000",
+        "546000"
       ],
       "ResetOnInit": true
     },
@@ -1238,6 +1239,12 @@
       "Duration": 33,
       "Value": "820000"
     },
+    {
+      "PowerHint": "DISPLAY_INACTIVE",
+      "Node": "MemFreq",
+      "Duration": 0,
+      "Value": "421000"
+    },
     {
       "PowerHint": "DISPLAY_INACTIVE",
       "Node": "CPULittleClusterDownRateLimitUs",
@@ -3267,4 +3274,4 @@
       "StaleTimeFactor": 5.0
     }
   ]
-}
+}