Updates IMS features when ImsService updates them

When the ImsService calls onUpdateSupportedImsFeatures,
we now recalculate features and create/remove features
based on these changes.

Bug: 77606031
Test: GTS ImsService Test (atest GtsImsServiceTests)
Change-Id: Ie97fbff5e1eadb4e00e9bd4d1ccb56c965f0becc