For BT and Camera test in CTS

1. Use /system/etc/firmware/bcm4330/bt_addr to fix MAC of bluetooth;
2. Fixed:
android.app.cts.SystemFeaturesTest --- testCameraFeatures;
android.media.cts.CamcorderProfileTest --- testGetWithId;
android.mediastress.cts.MediaRecorderStressTest --- testStressCameraSwitchRecorder.