When device enters page-agnostic mode using 16KB developer
options, show notification to user using boot receiver and service.
On clicked on notification, show detailed instructions on how to
get back to production mode. Removing OEM carrier unlock allowed
condition.
Bug: 295035851
Bug: 338139755
Bug: 302600682
Test: m Settings && adb install -r $ANDROID_PRODUCT_OUT/system_ext/priv-app/Settings/Settings.apk
Change-Id: Ib7a57af4c6151d2a8da1ec94130532d10b1679aa
Calling update engine to apply payload provided from boot_otas and
reboot on success. Updating different dialogues for 4k prompt.
Test: m Settings && adb install -r $ANDROID_PRODUCT_OUT/system_ext/priv-app/Settings/Settings.apk
Test: make RunSettingsRoboTests ROBOTEST_FILTER=Enable16kPagesPreferenceControllerTest
Bug: 295573133
Change-Id: Iab90a2c2fae5f6aefce95b2306db91c7b056d9f7
