SF: Remove StrongTyping in favor of FTL mixins

Bug: 185536303
Test: presubmit
Change-Id: I1a14abc565c5995c36fdd98c9fd35502b2ccceee
diff --git a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
index 7614453..eeca6be 100644
--- a/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
+++ b/services/surfaceflinger/Scheduler/RefreshRateSelector.cpp
@@ -286,7 +286,8 @@
 std::string RefreshRateSelector::Policy::toString() const {
     return base::StringPrintf("{defaultModeId=%d, allowGroupSwitching=%s"
                               ", primaryRanges=%s, appRequestRanges=%s}",
-                              defaultMode.value(), allowGroupSwitching ? "true" : "false",
+                              ftl::to_underlying(defaultMode),
+                              allowGroupSwitching ? "true" : "false",
                               to_string(primaryRanges).c_str(),
                               to_string(appRequestRanges).c_str());
 }