Ensure connection is unbound on call redirection timeout.

This CL ensures that the connection is unbound when the call redirection timeout is hit in CallRedirectionProcessor. This resolves a reported security vulnerability.

Test: manual using the provided APK + updated CallRedirectionProcessorTest
Flag: EXEMPT Security High/Critical Severity CVE
Bug: 376461726
(cherry picked from https://googleplex-android-review.googlesource.com/q/commit:4a358cfd8e403597651a6962e8e43c11ea906a59)
Merged-In: I76a65c3993f5107652f98bbe0283043ecff27a7c
Change-Id: I76a65c3993f5107652f98bbe0283043ecff27a7c