Revert "Bluetooth: handle opening incoming APK files"

Exposing file:// beyond the current app is no longer possible.
PackageInstaller seems to handle content URIs now, so revert this.

See 344744b49633 ("Exposing file:// beyond your app is bad, m'kay?")
in frameworks/base for more info.

This reverts commit d219b0cb.

Change-Id: I6900a8011ba82e6d48369834eadbe399be951143
(cherry picked from commit cca216e4)