IMS: Update IMS feature flags after feature is ready.

Update IMS feature flags like Volte/Vt/Wfc when Ims feature
state is ready.

This is to ensure Ims feature values are sent to modem
after DDS swtich.

Test: Manual
Bug: 64098630
Change-Id: Id396c6f4cd45a52b81812e068950bb4705179ba3
1 file changed