Gallery2: catch OOM error when crop big-size picture

An OOM error happened when set big size of picture as wallpaper

We catch the OOM error, and if fail to crop the picture, we
show a toast.

CRs-Fixed: 522476

Change-Id: Ia9d7f41ca768c9183b26051fb08c9f823fec0074
Merge "Gallery2: catch OOM error when crop big-size picture" into du44