1. add the L1 include path with a prefix, such like osi/list.h, stack/a2d_api.h and etc.
2. modify component, only bluedroid/api/include/api is export to another component and application,
other include path just for bluedroid used
3. put bluedroid/include into common/include/common, so the root directory of bluedroid have no include path.
4. modify doxygen to use esp_bt.h and redirect to
component/bt/bluedroid/api/include/api/
fix compile
1. change all gatt cb function to 3 args and function type. add gattc_if/gatts_if as second argument
2. delete gatt_if of "gatt cb param"
3. separate conn_id and gatt_if from conn_id
4. change the demo code as the gatt changed
