Audiopolicy: Fix DeviceVector::getDevice logic

It was currently ignoring address even if the default format was passed.

Test: adb shell audiorecorder --target /data/file.raw
Bug: 111453086
Change-Id: I44a17fa32c4dd32c426d20bf0902bd406682743c
Signed-off-by: Kevin Rocard <krocard@google.com>