Rename autoFillHint to autoFillHints.

Fixes: 35364993
Test: cts-tradefed run cts-dev -m CtsAutoFillServiceTestCases
Change-Id: I65a4c2c65563e7bbd60c4e99c8800b0b11af2300
(cherry picked from commit feb3299ed5fa30db8b1a4ab693e11e8acb32d13d)
9 files changed