2) SF-DM Generalization of Refresh Rates: Adding config variable and getter methods

Test: Logs. Unittest.
Bug: 142507213
Change-Id: Ibf93cfc2d88c4dd7764ba62d1b2c948fec534da8
diff --git a/libs/gui/tests/Surface_test.cpp b/libs/gui/tests/Surface_test.cpp
index c3e4cb9..3d90369 100644
--- a/libs/gui/tests/Surface_test.cpp
+++ b/libs/gui/tests/Surface_test.cpp
@@ -836,6 +836,12 @@
                                           float /*maxRefreshRate*/) override {
         return NO_ERROR;
     }
+    status_t getDesiredDisplayConfigSpecs(const sp<IBinder>& /*displayToken*/,
+                                          int32_t* /*outDefaultModeId*/,
+                                          float* /*outMinRefreshRate*/,
+                                          float* /*outMaxRefreshRate*/) override {
+        return NO_ERROR;
+    };
     status_t notifyPowerHint(int32_t /*hintId*/) override { return NO_ERROR; }
 
     status_t setGlobalShadowSettings(const half4& /*ambientColor*/, const half4& /*spotColor*/,