Set mAllowNonNativeRefreshRateOverride to true

We will only send non-native refersh rate override config for
gamedashboard. So we can make sure that SurfaceFlinger sends
the correct override list.

- Set mAllowNonNativeRefreshRateOverride to true by default

Bug: b/218534715, b/222135867
Test: atest DisplayManagerServiceTest
      atest FrameRateOverrideHostTest

Change-Id: Ic9cd4802e221144319e83d79fc422b5c3cb61a86

services/core/java/com/android/server/display/DisplayManagerService.java

@@ -2579,7 +2579,7 @@ public final class DisplayManagerService extends SystemService {
 
         boolean getAllowNonNativeRefreshRateOverride() {
             return DisplayProperties
-                    .debug_allow_non_native_refresh_rate_override().orElse(false);
+                    .debug_allow_non_native_refresh_rate_override().orElse(true);
         }
 
         @NonNull