LeAudio: Do not reconfigure on sink metadata update

Instead we should reconfigure on the local sink resume, since
sink metadata update event does not necessary means that the
sink will ever resume.

Bug: 268333427
Tag: #feature
Test: atest --host bluetooth_le_audio_client_test bluetooth_le_audio_test --no-bazel-mode
Change-Id: I132c766788b992065ebd181b9aa56f1b22c57564