1. Removed the global toggle switch - now each accessibility
feature has to be turned on or off separately.
2. Added a setting for the screen rotation (same as Dispaly)
since most of blind users want that behavior.
bug:5166161
bug:5127475
Change-Id: I659aef62a8499461075f43520a3008fa7b8ff911
1. Reimplemented accessibility settings accrding to UX design.
NOTE: The strings are not final, rather reasonable placeholders
to avoid blocking on them. Will submit another CL with string
updates and any necessary polishes.
bug:5065409
Change-Id: I3ba229a624298dbf238bc8562b42616b386f8c34