Key forwarding and single app mode update

Updated protocol definition for new protocol changes.
Changed AppsResponse message, added KeyEvent and Config messages.

Co-commits:
android_device_mitre_svmp
android_external_svmp_eventserver
android_frameworks_base
svmp-android-client
svmp-protocol-def
Merge pull request #2 from jportner/master

Key forwarding and single app mode update