SwitchPreference and SwitchPreferenceCompat are both TwoStatePreference.
Using TwoStatePreference in Java will helps migration in the future.
Bug: 306771414
Test: manual - check Settings pages
Change-Id: I84e1d7b09451106797c2b23d127855c6976678ca
The nfc properties are now added to system/libsysprop and
were renamed at the same time for homogenity.
Bug: 268219397
Test: m Settings
Change-Id: I496e128b9db225aac583a1e0b91687f78a268b63