Gallery2: update select title and menu in selectAll mode

If albumpage is in selectAll mode, and then
capture a new picture, the selected picture
become more, and the actionmode not been
updated, if tap edit, it throws an AssertionError.

When size changed and is in selectAll mode now,
we update the selected count and supported
operations.

CRs-Fixed: 510675

Change-Id: I77c4a23c327a1ce1bf5b822db23ac065563d1741