Enable options menu on ICS+
On android devices that don't have hardware menu button, openOptionsMenu doen't work. Setting the minSdkVersion to 10 or less will add the software menu button and enable the openOptionsMenu call.

I've tested it on Android 4.1.2

Relative links:
http://stackoverflow.com/questions/13322940/menu-button-on-newer-android-devices
http://stackoverflow.com/questions/9996333/openoptionsmenu-function-not-working-in-ics