Move PointerController enums to enum classes.

Bug: 160010896
Test: atest PointerController_test, compile
Change-Id: Ie5ba68a5082fff6ccc85ab01ff49344b73d0bb1b
Merged-In: Ie5ba68a5082fff6ccc85ab01ff49344b73d0bb1b
(cherry picked from commit ca5bede6d18f05e025b3c46c989091bad7895845)
4 files changed