Fix local GD cert runner

* Local GD cert test runner stopped working after mobly migration
* Fix it by using p/m/B/system as root instead of gd
* Change namespace strings in every test and facade files
* Move interface protos to blueberry namespaces

Test: system/gd/cert/run --clean
Test: system/gd/cert/run --device
Test: system/gd/cert/run
BYPASS_LONG_LINES_REASON: Bluetooth likes 120 lines
Tag: #refactor

Change-Id: Ib1bd0b9e2e43264bdb9eb0e5bd8173d2015d87cf