Add featureflag:reorganize_roaming_notification

If this feature is enabled, Apply improvements to roaming
notifications. If this feature is disabled, the roaming
notification may not be dismissed if the status does not match
the return value of isShowRoamingNotificationEnabled.

Bug: 310594087
Bug: 289485983
Test: manually tested in AT&T roaming network.
Change-Id: I7f525196ae646713abb5b1719a92dfe62978c7b2
1 file changed