Use test local tags for determining test log line output

We're removing log enforcement variables from the platform, which means
this test can no longer reference them either.

Tag: #refactor
Flag: EXEMPT, logging only change
Bug: 315046089
Test: atest BluetoothInstrumentationTests
Change-Id: I06b0847b72f96803de572c61aeb8bfa99d90dbcf