INfcTag isPresent() should not block and not cause RF activity.

Use a cached value instead, which is based on the presence check that is running
anyway.

Change-Id: Ifa50ff38e884fa865bb7ba95dde45da39bebf7e8
2 files changed
tree: 687df77881c5433aefbe49eab571967a92d69844
  1. jni/
  2. res/
  3. src/
  4. Android.mk
  5. AndroidManifest.xml