- remove brcm a2dp vendor code
- include brcm a2dp vendor code as a static library
- move extern definitions to compile cleanly
- fix paths in vnd_buildcfg to allow being included remotely

Change-Id: If0487c9f4885c4211e04ccb672387f94a1329618
Test: Vendor verified
Signed-off-by: Sridhar Vashist <svashist@motorola.com>