bugfix: allow recent apps dialog to work with menu long-press

With the original patch, using the recent app dialog from a
menu button long-press would cause the dialog to be preloaded
and then dismissed on key-up. Check long-press behavior settings
as well as short-press to prevent the dismissal.

Change-Id: Idf1d27aa725547e0ddc44905e27da6c1b4540fab

Conflicts:

	policy/src/com/android/internal/policy/impl/PhoneWindowManager.java