Gallery2: fix can not crop large *.bmp picture

It returns an equivalent scaled cropBounds as true
crop bounds, then it set the rounded rect by rounding
"out" the true crop rect, this make the rounded crop
rect may out range of the original bitmap, then an error
will happen.

We change to check the rounded crop rect, if it is out
the range of original bitmap, we set the original bitmap
bounds as rounded crop bounds.

CRs-Fixed: 621889

Change-Id: Ifb63754255b618fe65a4064663dfb4962bfdf8b8
Merge "Gallery2: fix can not crop large *.bmp picture" into du44