powerhint: Disable auto margins

And restore DownRateLimitUs to previous values as they're not compatible
without the feature being enabled.

Bug: 383127224
Bug: 383332732
Flag: EXEMPT not support for powerhints
Signed-off-by: Qais Yousef <qyousef@google.com>
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:7f6c9ffd1d4d962051547fced295d30b2f6dca4b)
Merged-In: I098d21755eda4821880ca28868d293e7eb068a69
Change-Id: I098d21755eda4821880ca28868d293e7eb068a69

powerhint-comet.json

@@ -59,7 +59,7 @@
         "1000",
         "500"
       ],
-      "DefaultIndex": 3,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {
@@ -110,7 +110,7 @@
         "2000",
         "500"
       ],
-      "DefaultIndex": 4,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {
@@ -162,7 +162,7 @@
         "2000",
         "500"
       ],
-      "DefaultIndex": 3,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {
@@ -243,7 +243,7 @@
         "0",
         "1"
       ],
-      "DefaultIndex": 1,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {
@@ -253,7 +253,7 @@
         "0",
         "1"
       ],
-      "DefaultIndex": 1,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {
@@ -297,7 +297,7 @@
         "0",
         "512"
       ],
-      "DefaultIndex": 1,
+      "DefaultIndex": 0,
       "ResetOnInit": true
     },
     {