Stop automatically creating selection action mode.

With Ic025c109539c3b5963, selection action mode is created always
when selection is made. It causes distraction in some cases.
This CL fixes this issue. This CL stops starting selection action
mode when action mode is currently not active and not intended to
restart.

Bug: 27536744
Bug: 27551819
Change-Id: I94ee66864000934a21ef0d18c1d71429c67114fa