SnapdragonCamera: Fix naming issue for frame dumps

Due to switching registerImage to a parallel task,
we ran into the issue of overwriting the previous frame with
the current frame. Decouple numbering with registered status
to avoid overwrites. Also add timestamp in ms to dump filenames.

CRs-Fixed: 1054524
Change-Id: I8cc17989c4c72c8f9bed11c2b208df61583c8866
1 file changed