Fix vulnerability in CallRedirectionService. am: 29b52e3cd0

Original change: https://googleplex-android-review.googlesource.com/c/platform/packages/services/Telecomm/+/24151559

Change-Id: I03933b043034d8ef46c0a77d80fff61a034cce06
Signed-off-by: Automerger Merge Worker <android-build-automerger-merge-worker@system.gserviceaccount.com>