power: Modify power HAL hint for Interactive governor

Currently power HAL sets display off hint to 500ms for
Interactive Governor, this change modifies the hint to 50ms
to enable CPU to sample and scale better.

Change-Id: I611f7d318c78f85fb345852b8e2c82ec1cbda006
diff --git a/power.c b/power.c
index cf56bb0..b69295e 100644
--- a/power.c
+++ b/power.c
@@ -260,7 +260,7 @@
             }
         } else if ((strncmp(governor, INTERACTIVE_GOVERNOR, strlen(INTERACTIVE_GOVERNOR)) == 0) &&
                 (strlen(governor) == strlen(INTERACTIVE_GOVERNOR))) {
-            int resource_values[] = {TR_MS_500, THREAD_MIGRATION_SYNC_OFF};
+            int resource_values[] = {TR_MS_50, THREAD_MIGRATION_SYNC_OFF};
 
             if (!display_hint_sent) {
                 perform_hint_action(DISPLAY_STATE_HINT_ID,