CarrierSwitch: Remove old CarrierSwitch solution framework code

CarrierSwitch use a new solution from P or later. the new solution
switch carrier by a standalone apk instead of modifing the AOSP
framework code in old solution.

Remove framework changes for old carrier switch solution.
1. Remove carrier switch service related files.
2. Remove call from PMS and SystemServer.

Change-Id: I619d320b4ac28f390fc0e37cac5cb6c7a4e018ec
CRs-Fixed: 2377064
6 files changed