Disabling the shortcut if no service is configured, so we
users won't see an "On" unless the shortcut will have an
effect.
If no service is configured and the user tries to enable
the shortcut, the service picking UI is shown. If the user
chooses a service, the shortcut turns on. If not, the
shortcut remains off.
Service selection is disabled when the shortcut is disabled
(except for the specific case above).
Lock screen behavior selection is disabled when the shortcut
is disabled.
Also updating a couple of strings based on UX input.
Adding an AOSP header to a file that somehow got checked in
without one.
Fixes: 37443184
Fixes: 38030853
Test: Manually went through the various combinations of
shortcut on and service enabled. I turned off the default
selection of TalkBack as the shortcut service to ensure
that we show a dialog when no service is selected.
Change-Id: Iac5cff12edea91a496fc81781518db4ae49ef334
Settings thought the default for "Allow from lock screen" was
on. It's really off.
Bug: 37158451
Test: Manually confirmed that a fresh device now shows off.
Change-Id: I38dc4f6d2bfec5e0c8562c0d2c6e034db461aa98
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
