Update GN files for building on Linux/Chrome OS

* Add missing GN files
* Move test targets under use.test
* Move non-standard codec targets under use.bt_nonstandard_codecs
* Add missing source files

Bug: 177961465
Tag: #refactor
Test: atest --host bluetooth_test_common

Change-Id: Ib7ba2705b2fd53d4c4d87916e99f35e7fce6c98e