Remove NFC HCE Latency Flag from non-updatable flags.aconfig

We previously added the nfc_hce_latency_events flag to this file, but we should use the flags in `packages/modules/Nfc/flags` instead, which will be used for Android 16+ targeting features.

Bug: 393398058 
Change-Id: Iec27a49bf5ab829d8dc9d26fd0f6b573d370c181
Test: Compiles
Flag: com.android.nfc.module.flags.nfc_hce_latency_event