Developer option for booting with 16K pages

Adding developer option to boot with 16K compatible kernel. Adding
resources, layouts and dialog classes for 16k option. This needs
to integrated with update engine to make OTA switch happen.

Test: m Settings && adb install -r $ANDROID_PRODUCT_OUT/system_ext/priv-app/Settings/Settings.apk
Bug: 295035851
Bug: 294614538
Change-Id: I3a24fed059eee99407e3486a7254285e0e4a251c