nfc: use monotonic clock

Android api 28 introduces 'sem_timedwait_monotonic_np',
which takes 'monotonic clock' instead of 'realtime clock',
and is not affected by NTP adjustment. 'sem_timedwait_monotonic_np'
should be used for timeout.

Test: m
Change-Id: I34e8df5af4cca13068353b44d66dcb65702c537b
5 files changed
tree: 35dc7706229313f8ced6420f784d14ff4a8f54ac
  1. intf/
  2. pn8x/
  3. snxxx/
  4. .clang-format
  5. Android.bp
  6. METADATA
  7. OWNERS
  8. PREUPLOAD.cfg