Camera fix

So fileUri was messing up for me and causing a null pointer. I changed it to be stored in MapleApplication instead of BrowseActivity from the AdCreationDialog.

It now seems to work great for me on my phone, and the emulator.

Ben: The crop activity is doing something really weird on my emulator since your last changes. Whether the picture comes from the gallery or camera, it doesn't seem to get it. It just shows a grey dot in the center of crop view, no picture, and crashes when you hit next. This was happening without my recent changes.