Fix for multi-line action bar.

Add back check for whether system supports multi-line actionbar instead
of always using the system action bar.  Looks like this was removed
accidentally in Change-Id: I59d3c5b53cfb25d87824b93e59158b6ed2429e1c
Since multi-line action bars are only introduced in JB MR1.1,
we only want to use system action bar if system supports it.
On older devices, always use our custom action bar that can do multi-line
subjects.

Bug 8124889

Change-Id: I0e2180e23de979692e8907b070b7229280ddf3a6
1 file changed