Merge "Explicitly set apex updatable to false." am: 78beda626e am: caf71a4c9a

Original change: https://android-review.googlesource.com/c/platform/packages/services/Telephony/+/1589974

MUST ONLY BE SUBMITTED BY AUTOMERGER

Change-Id: I44f04f147da9685cbf9765cf34154a438fc9ccb5