Remove frameworks/opt/bluetooth

This project is no longer used.
Test: make

default.xml

@@ -412,7 +412,6 @@
   <project path="frameworks/multidex" name="platform/frameworks/multidex" groups="pdk-cw-fs,pdk-fs" />
   <project path="frameworks/native" name="platform/frameworks/native" groups="pdk" />
   <project path="frameworks/opt/bitmap" name="platform/frameworks/opt/bitmap" groups="pdk-fs" />
-  <project path="frameworks/opt/bluetooth" name="platform/frameworks/opt/bluetooth" groups="pdk-cw-fs,pdk-fs" />
   <project path="frameworks/opt/calendar" name="platform/frameworks/opt/calendar" groups="pdk-cw-fs,pdk-fs" />
   <project path="frameworks/opt/chips" name="platform/frameworks/opt/chips" groups="pdk-cw-fs,pdk-fs" />
   <project path="frameworks/opt/colorpicker" name="platform/frameworks/opt/colorpicker" groups="pdk-cw-fs,pdk-fs" />