Move to ACCESS_RCS_USER_CAPABILITY_EXCHANGE for UCE APIs

Move from MODIFY_PHONE_STATE to ACCESS_RCS_USER_CAPABILITY_EXCHANGE
permission for associated APIs.

Bug: 174861641
Bug: 154764486
Test: atest CtsTelephonyTestCases
Change-Id: I978161a230ce23e17d3b16cc92c3e82ea1cbb407
2 files changed