Fix, DeviceCapabilityListener does not try to register IMS registration callback.
When IImsFeatureStatusCallback#notifyImsFeatureStatus() calls with unavailable and ready within short time, the PublishControllerImpl's handler calls DeviceCapabilityListener#onRcsConnected and #onRcsDisconnected consecutively. During this time the DeviceCapabilityListener keeps EVENT_UNREGISTER_IMS_CHANGE and EVENT_REGISTER_IMS_CONTENT_CHANGE messages in Q. When the DeviceCapabilityListener handles EVENT_UNREGISTER_IMS_CHANGE message, it removes EVENT_REGISTER_IMS_CONTENT_CHANGE from Q. By deleting EVENT_REGISTER_IMS_CONTENT_CHANGE, the DeviceCapabilityListener does not try to register the IMS registration callback. Bug: 287833083 Test: atest DeviceCapabilityListenerTest, RcsUceAdapterTest Test: AT&T and TMO live network Change-Id: I5010adfb3e1ce2880cb8f816f021c44257d9c521
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