Set the aptx as provided by system

Aptx and aptx-Hd are both vendor libs in system_ext.
In order to load their dependencies from a compatible environement
Bluetooth need to setup the linker

Fix: 231967310
Test: atest net_test_stack_a2dp_native
Test: Log analyze after bluetooth boot
Tag: #refactor
Ignore-AOSP-First: Apex only on tm and below
Change-Id: I752e65889a42fe3378f51bd0821c2958ed9b5a7d