Revert "Telephony: Add back CMD_TOGGLE_2G & CMD_TOGGLE_LTE"

This reverts commit 65fa43d8b63ab614488c4d9cbc6e7d7454e900fc.
Revert "Telephony: Support for SEEK on Android"

This reverts commit 4d9a8d7ce1a115a9aa342d21730cee32b9ba2c55.