[Composer-VTS] Check minFrameIntervalNs to check if rate is changing

With different VRR modes we may have 2 modes with
exactly the same minFrameIntervalNs, and in this case we can't
differentiate between 2 modes.

Test: atest VtsHalGraphicsComposer3_TargetTest
BUG: 328350178
Change-Id: I5cddfee8b789ed6ce1b223ec345175f19a0db091
diff --git a/graphics/composer/aidl/vts/VtsComposerClient.h b/graphics/composer/aidl/vts/VtsComposerClient.h
index fabc82a..d3842c5 100644
--- a/graphics/composer/aidl/vts/VtsComposerClient.h
+++ b/graphics/composer/aidl/vts/VtsComposerClient.h
@@ -258,13 +258,13 @@
 
     struct DisplayConfig {
         DisplayConfig(int32_t vsyncPeriod_, int32_t configGroup_,
-                      std::optional<VrrConfig> vrrConfig_ = {})
+                      std::optional<VrrConfig> vrrConfigOpt_ = {})
             : vsyncPeriod(vsyncPeriod_),
               configGroup(configGroup_),
-              vrrConfig(std::move(vrrConfig_)) {}
+              vrrConfigOpt(std::move(vrrConfigOpt_)) {}
         int32_t vsyncPeriod;
         int32_t configGroup;
-        std::optional<VrrConfig> vrrConfig;
+        std::optional<VrrConfig> vrrConfigOpt;
     };
 
     void addDisplayConfig(int32_t config, DisplayConfig displayConfig) {
@@ -273,6 +273,21 @@
 
     DisplayConfig getDisplayConfig(int32_t config) { return mDisplayConfigs.find(config)->second; }
 
+    bool isRateSameBetweenConfigs(int config1, int config2) {
+        const auto displayConfig1 = getDisplayConfig(config1);
+        const auto displayConfig2 = getDisplayConfig(config2);
+        const auto vrrConfigOpt1 = displayConfig1.vrrConfigOpt;
+        const auto vrrConfigOpt2 = displayConfig2.vrrConfigOpt;
+
+        if (vrrConfigOpt1 && vrrConfigOpt2 &&
+            vrrConfigOpt1->minFrameIntervalNs == vrrConfigOpt2->minFrameIntervalNs) {
+            return true;
+        } else if (displayConfig1.vsyncPeriod == displayConfig2.vsyncPeriod) {
+            return true;
+        }
+        return false;
+    }
+
     std::unordered_map<int32_t, DisplayConfig> getDisplayConfigs() { return mDisplayConfigs; }
 
   private: