Enable disableLegacyContext Flag in RN Test

Author: yungsters

packages/shared/forks/ReactFeatureFlags.test-renderer.native.js

@@ -35,7 +35,7 @@ export const disableIEWorkarounds = true;
 export const enableScopeAPI = false;
 export const enableCreateEventHandleAPI = false;
 export const enableSuspenseCallback = false;
-export const disableLegacyContext = false;
+export const disableLegacyContext = true; // TODO: Verify safety of enabling.
 export const enableTrustedTypesIntegration = false;
 export const disableTextareaChildren = false;
 export const disableModulePatternComponents = false;