Fix accessibility events emitted from TwoStatePreference

Removes redundant and conflicting events emitted from check and switch
preferences. Sends VIEW_CLICKED accessibility events from AdapterView
rows after calling their on click listeners, which ensures data is
consistent.

BUG: 16961152
Change-Id: I4b57bceec6830d775c2da57226b8ee482242caf7
4 files changed