Include folders on the root of the sdcard

[d4rken]

We currently don't include databases in custom app dirs in the root of public storage. While databases there are rare it's still possible. We don't want to scan everything though for performance reason.

How many levels do we search though.

/storage/emulated/0/Locus/data/database/waypoints.db

is currently not found, to find out though we have to search 3 levels deep, this could increase scan time quite a lot. Limiting search to all dirs with known owners should could it down. Also need to exclude dirs owner by android and dirs flagged common.

• Include public storage roots
• Ensure we don't search nested public storages ( /sdcard/externalSD) twice
• Only known owners
• Exclude owner system
• 3 levels deep
• Exclude with flag common

[d4rken]

Not putting any additional restrictions on the searchpath on this for now as it would conflict with the option that allows users to modify and add search pathes via settings.