Camera: Clean up the image/video file naming code

1) Create 'image_file_name_format' string in strings.xml

2) Change createName() routines in Camera.java and
   VideoCamera.java to use 'image_file_name_format' and
   'video_file_name_format', respectively.

3) Change image filenames on SD card to format:
   IMG_yyyyMMdd_HHmmss.jpg -- e.g. IMG_20091020_120000.jpg

   (Old format was 'yyyy-MM-dd HH.mm.ss.jpg' which
    contained undesirable space character in the filename.)

4) Similarly, change video filenames to format:
   VID_yyyyMMdd_HHmmss.3gp -- e.g. VID_20091020_120000.3gp

   (Old format was 'video-yyyy-MM-dd-HH-mm-ss.3gp' which
    was not consistent with the image filename format.)
3 files changed