Defer to SelectionControllerEfl more gesture handling.

Defer to SelectionControllerEfl more gesture handling.

There is no funcionality change, but similarly to [1]
patch frees RWHVEfl from text selection specific gesture
handling. Logic now is centrilized SelectionControllerEfl.

This makes an eventual switch to chromium's composited
text selection more smooth from a RWHVEfl perspective.

The following class members and related logic were moved:
- should_restore_selection_menu_
- selection_acked_on_tap_
- single_tap_performed_
- was_scrolled_

[1] http://165.213.202.130/gerrit/#/c/86367

Original beta/m42 patch:
- http://165.213.202.130/gerrit/#/c/85200/ , reviewed by
Janusz Majnert, Arnaud Renevier.

Bug: http://107.108.218.239/bugzilla/show_bug.cgi?id=6663

Reviewed by: arno renevier, Janusz Majnert, SeungSeop Park, David Michael Barr

Change-Id: I24115b21d4901ce1cb9070ac9f68a21c54843ead
Signed-off-by: Antonio Gomes <a1.gomes@samsung.com>