Build script for android apps fixed

Additional library dependency removed
android-ibrdtn-api.jar is no longer copied to the libs folder of the apps
ExampleApp added
Communicator added
android-daemon: Data related classes moved to .data package
android-api: Added method to request an intent to select a neighbor
android-daemon: Added activity to select a neighbor
DTNExampleApp: Use new API to select a neighbor
ShareBox: Use new API to select a neighbor
ShareBox: New high resolution launcher icon and unused icons removed
ShareBox: Lint warning fixed
ShareBox: API level raised
Add fragment length to unique bundle ID

As described in the RFC 4838 the bundle fragment length is part of the unique bundle
identifier. This patch adds the fragment length to the BundleID object and changes the
payload length field in the status reports and custody signals to that value. The
serialization of the BundleID is also modified to include that value.