Add READ_PRIVILEGED_PHONE_STATE to TestApi

Add READ_PRIVILEGED_PHONE_STATE to TestApi in order to support
SplitPermissionsSystemTest.

Bug: 156297292
Test: atest SplitPermissionsSystemTest
Merged-In: I67520ba9f8bf25b759f6552a332bdebf67f4c7e6
Change-Id: I67520ba9f8bf25b759f6552a332bdebf67f4c7e6
2 files changed