Whitelist MVNO type and data fields from permissions

WRITE_APN_SETTINGS is required to view sensetive fields in APNs but MVNO
type and data are okay to read.

Bug: 110033164
Test: manually verified with adb query:
"adb shell content query --uri content://telephony/carriers --projection
mvno_type:mvno_match_data"
and use the unit test cts/TelephonyProviderTest.java to verify the
permissions are allowed
Change-Id: I7a9fbd84e6a572307b22c548f334112eb67997ed
1 file changed