fix possible NPE
make tapping on the camera image work for capture
we only need the drive.file perm scope
use the GoogleAuthUtil code
only unmount if vfs is not null
Camera activity must manually start suckers now
improve DCIM Obs import process to be more streamlined
- import files as they are detected, no waiting until camera is closed!
- don't create bitmpas of full image; use some more efficient loading tricks
- faster hashing!