Wasn't checking if the user actually agreed. Whoops.
Bug: 37123004
Test: Manually verified that canceling leaves the selection
unchanged.
Change-Id: I48a052eb74733d3d0105fc1e72c4bf77ce8be0c5
Adding shortcut on/off switch, improving the service picker,
and adding a switch to enable the shortcut on the lock screen.
Also adjusted setting search code to avoid indexing the
accessibility shortcut aside from the main accessibility settings
page.
Bug: 35872328
Bug: 35219988
Test: Ran in a variety of conditions, ran existing settings test.
Also added basic robo test, verified existing robo tests pass.
Change-Id: I4da9bad74caf96d9c8f3640e7db5417b4ee5d602
