UnifiedEmail: wrap message details in scroll view

If there are enough to/cc/bcc targets, the text will go off the scren.

Wrap it in a scroll view.

Change-Id: I2079fd18002421911566e99b1369ef7f09bbfaea
Signed-off-by: Roman Birg <roman@cyngn.com>
Merge branch 'cm-11.0' of https://github.com/CyanogenMod/android_packages_apps_UnifiedEmail into cm-11.0