Landscape extracted mode - floating toolbar interference

In landscape do not allow starting selection modes if the
extracted mode has not yet started. Also remove the single
tap selection delayed runnable.

This allows for a smooth transition (as in no floating
toolbar artifacts) into extracted mode. Also fixes
(more as in hides) the double selections.

Bug: 20930071
Change-Id: Idb9c375dc25777761b11ca17ccfd9f5eedc642b4