Add the new content protection preference option and subpage in Settings ->...

Add the new content protection preference option and subpage in Settings -> Security & privacy -> More security & privacy settings.

Bug: 302189945
Test: robotests
m -j256 Settings
atest SettingsRoboTests:ContentProtectionPreferenceControllerTest
atest SettingsRoboTests:ContentProtectionPreferenceFragmentTest

Change-Id: I620d73f8674c1340f9b11cd910620f1d5afb0ec1