Backported from HC.
Squashed commit of the following:
commit af214a595c7a9fdd11a2dc384f7d4665abf751c0
Fixes in TextView's selection.
commit eb9fd59ebe6500a66c2003d46b5802299970ae8d
TextView with Selection Contextual Mode
commit 4c4c338ef355b369ce4b57d6c6fba7ee8f9dddf4
Cosmetic changes around TextView.
commit d4b4b054e87480d984ad18766f5e76553e3080d8
Double and one and a half tap removed from TextView.
commit 897c2847ba1fca8ef01eadadd1bc3de007af3ee5
Selection handlers in TextView
commit 832be74a5394649e28927484d9a86c6d53b430e7
New cursor controller in TextViews.
Change-Id: I01cc64736e2abea605317ee53907a1713617fc17
b0d6ba1ec4