SF: move trunk stable flags to FlagManager

Test: presubmit
Bug: 297389311
Bug: 278199093
Bug: 284845445
Bug: 273702768
Bug: 259132483
Bug: 283055450
Change-Id: I2a85b2534ac8d472acd0de443785317871bbfe89
diff --git a/services/surfaceflinger/tests/unittests/FlagUtils.h b/services/surfaceflinger/tests/unittests/FlagUtils.h
index 7103684..333e4e7 100644
--- a/services/surfaceflinger/tests/unittests/FlagUtils.h
+++ b/services/surfaceflinger/tests/unittests/FlagUtils.h
@@ -16,12 +16,16 @@
 
 #pragma once
 
+#include "FlagManager.h"
+
 #define SET_FLAG_FOR_TEST(name, value) TestFlagSetter _testflag_((name), (name), (value))
 
 namespace android {
 class TestFlagSetter {
 public:
     TestFlagSetter(bool (*getter)(), void((*setter)(bool)), bool flagValue) {
+        FlagManager::getMutableInstance().setUnitTestMode();
+
         const bool initialValue = getter();
         setter(flagValue);
         mResetFlagValue = [=] { setter(initialValue); };