Frameworks: add never sleep screen mode (1/2)

Thanks to kufikugel

https://github.com/temasek/android_frameworks_base/commit/2a8efc2c608ecc58b7043d1d2a417f7c321c1acf
(cherry picked from commit 1ebc36d44adedcdb4e996e701f2e244ab4497552)
(cherry picked from commit 3576014de0b53d53176d18d858e4d9cfc0ec6675)