ProfileChooser: Introduce flags specifying which profiles to list.

Introduce flags to filter profiles that have a debugger
configured, restrict to host abi and include invalid profiles
(which is not relevant if only debugging is desired).
Introduce convenience flags for debugging.

Introduce populate() function for cleanliness.

Change-Id: I476c40cc9a59e4dd5b1bc7c49597e9169c053754
Reviewed-by: hjk <qthjk@ovi.com>