Do not allow capability discovery until user opt-in occurs

1) Ensure user has enabled contact discovery before allowing
capability requests.
2) Modify permissions on isUceSettingEnabled to
READ_PHONE_STATE so that all applications can access it.

Bug: 111305845
Test: atest CtsTelephonyTestCases:RcsUceAdapterTest
Merged-In: I79074b4b51da0db9c28c6c8435ef5322264cd169
Change-Id: I79074b4b51da0db9c28c6c8435ef5322264cd169
1 file changed