Re-enable app long-press menu on Go devices

Deep shortcuts and the home-screen Widgets menu were removed from Go in b/112904271. Subsequently removing the entire app long-press menu, however, may have been unintended behavior. This re-enables that menu, which currently houses the App Info system shortcut.

Bug: 156120551
Test: Manual
Change-Id: Ifa0befe1896315b5ed905271c2cf4805f70c39c0