Fix the test case failed

-Add flag FLAG_IS_DUAL_SIM_ONBOARDING_ENABLED
-Add mock for SubscriptionManager.createForAllUserProfiles

Bug: 323652989
Test: atest NetworkProviderCallsSmsFragmentTest
atest SubscriptionsPreferenceControllerTest
atest DefaultSubscriptionControllerTest
atest DisableSimFooterPreferenceControllerTest
atest MobileDataPreferenceControllerTest
atest MobileNetworkSwitchControllerTest
atest MobileNetworkUtilsTest
atest NetworkSelectSettingsTest

Change-Id: I4d473140f291daec0f8e56c01bd8f7cfa2d0c82e