give audioserver access to media.metrics

Let the audioserver record metrics with media.metrics service.
This is for 'audiopolicy' metrics.

Bug: 78595399
Test: record from different apps, see records in 'dumpsys media.metrics'
Change-Id: Ie5c403d0e5ac8c6d614db5e7b700611ddd6d07e9
Merged-In: I63f9d4ad2d2b08eb98a49b8de5f86b6797ba2995