Add camcorder support to the file picker.

Camcorder will now be supported in the upload dialog for blank accept types,
*/* or video/*. Additionally web developers can specify "video/*;source=camcorder"
to jump straight into the camcorder activity, or "video/*;source=gallery" to jump
straight into the gallery filtered for videos.

Change-Id: I5eb48273c71add12075b537fb56b17d5776ef40d
1 file changed