Fix a bug where a batch edit would not be started.

This would end up in TextView sometimes calling onUpdateSelection
multiple times (this is the correct behavior for TextView). We now
commit the space and the word in a batch edit, and we only get
onUpdateSelection once.

Bug: 6300527
Change-Id: I9579f3d8f5320c1cc24a7a42f19db8e105eb090d