Fix bugs around vCard export and use new APIs
1) let vCard exporter select correct destination.
Multiple vCard exports don't select different destination:
if users request "export", "import" and "export", they will have
just one exported vCard with imported data, not two (one without
import result and another with the result). This is because
each vCard exporter independently refers to existing files in USB
storage.
This changes make vCard service check available files and remember
file names already reserved.
2) use new Notification.Builder API
3) show user-friendly message when there's no vCard on USB storage
Bug: 3219880
Bug: 3219906
Change-Id: I159d25439023eb10934729a00f4da6d157e44b09
6 files changed