Protect TelecomManager#getPhoneAccount with necessary permission. am: ba2e174009 am: 0f3abec991 am: 4653ee7af3

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/15053354

Change-Id: Ib93a4b64cedffedfd36f6078a0d8ddfbb2dfac92