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