Make the 'NETWORK_FACTORY' permission privileged

Making the permission signature | privileged requires that current
signature level users also include the permission in their priv-app
allowlist. Updating privapp-permissions-platform.xml accordingly.

CTS change - ag/34556176, Updating the
permission in bluetooth module - ag/34554981

Flag: android.net.platform.flags.update_network_factory_protection_level
Bug: 431500580
Change-Id: I9a09ebfd63c6f88bba6bc5300cd325afffd75d79