fix(react-native-host): fixed ReactNativeHost.mm not compiling

[tido64]

Description

Fixed ReactNativeHost.mm not compiling due to missing header:

[ReactNativeHost] Compiling ReactNativeHost.mm
Error: no member named 'ReactNativeFeatureFlags' in namespace 'facebook::react'
   80 |             facebook::react::ReactNativeFeatureFlags::override(
      |             ~~~~~~~~~~~~~~~~~^

Test plan

n/a