Keep better track of connection status in Enabler.
Check for same class in custom equality comparison.
Add a tab in Enabler to view received CAN messages.

Half of #152, need to add a detail view.
Merge branch 'next' into can-messages-view
Make new fragment views less crowded with more padding.
Update CAN list view more efficiently, only re-build for new messages.
Allow register for notifications on all messages of a class type.
Remove unused methods for adding measurement listeners for a KeyMatcher.

I can't think of a use case for this anymore.
Watch for an invalid activity when receiving messages in Enabler.
Remove a resolved TODO.
First attempt at a CAN message detail view.
Remove listeners before unbinding from vehicle service.
Remove duplicate implementation of byteArrayToHexString.
Fix up CAN message detail view a bit.
Disable CAN message detail view, for now. See #159.