Remove the system API of getCarrierBandwidth()

Remove the system API of getCarrierBandwidth() and CarrierBandwidth as
they are replaced by the new LCE system API in PhoneStateListener.

Bug: 176814680
Test: atest -c PhoneStateListenerTest

Merged-In: Icdb035bcc65195ce6bd6b80013f14eb879e797a8
Change-Id: Icdb035bcc65195ce6bd6b80013f14eb879e797a8
1 file changed