Add a dialog to ask user to start an application for a USB device or accessory

This is used when there is only one application available and the user has
not chosen to start it by default.
If more than one application is available we continue to use UsbResolverActivity

Bug: 4074719

Change-Id: Id61f2ccc6de5b9ac70fb4670006ff1fee2028d55
Signed-off-by: Mike Lockwood <lockwood@android.com>