[0.74] Fix Privacy Manifest generator when it does not contain a NSPrivacyAccessedAPITypes key

[renchap]

Target Branch(es)

0.74

Link to commit or PR to be picked

react/react-native#44628

Description

This fixes an issue with PrivacyManifests from dependencies do not include a NSPrivacyAccessedAPITypes key.

[cipolleschi]

Picked ✅