Gallery2: fix can not add gallery widget to home screen

When selected to add a cropped picture to home screen,
the binder transaction failed because it was too large,
add widget failed.

We reduce the allowed maximum bitmap size in intent,
to make sure that binder size will not greater than 1M.

CRs-Fixed: 528927

Change-Id: Id63c8503dead66ab18531a78b0b4206d1fd30d07
Gallery2: fix selection count didn't update after floder is deleted

If we select an album and then delete it in file explorer, the
Gallery2 can not update the selection count, we change to
leave selection mode when albumsetpage is paused.

CRs-Fixed: 529042

Change-Id: Ic972ea23a64e0779e18ca9397b4619fb90ce3ecf