Fix bug 3050138 - Action bar does not display correctly when many

action items are added

Rules for action bar overflow:

Items are considered for inclusion in the order specified within the
menu. There is a limit of a total count, optionally including the
overflow menu button itself. This is a soft limit; if an item shares a
group ID with an item previously included as an action item, the new
item will stay with its group and become an action item itself even if
it breaks the max item count limit. This is done to limit the
conceptual complexity of the items presented within an action
bar. Only a few unrelated concepts should be presented to the user in
this space, and groups are treated as a single concept.

There is also a hard limit of consumed measurable space. This limit
may be broken by a single item that exceeds the remaining space, but
no further items may be added. If an item that is part of a group
cannot fit within the remaining measured width, the entire group will
be demoted to overflow. This is done to ensure room for navigation and
other affordances in the action bar as well as reduce general UI
clutter.

The space freed by demoting a full group cannot be consumed by future
menu items. Once items begin to overflow, all future items become
overflow items as well. This is to avoid inadvertent reordering that
may break the app's intended design.

Change-Id: I878f6b15619059258c91c01f4fe838feac161d6d