Gallery2: support loop/single video play mode

(cherry picked new files from commit id
990c6d43ea7c184846e19d41bef0d93aee4e581b)

Change-Id: I0f55dfdfe812262804e7e45c99c7c9bbc5fb7503
Gallery2: Support HSCI screencolor settings use

Support to change HSCI values of the picture from Gallery2 in
screencolor settings, and set a picture as screen color.

Change-Id: If45adfca632083f297a58f3431ce9177bd4433c4