example/gatt_counter: print ATT Writes

example: use sdp_create_service_record_handle() for sdp record and assert sdp record buffer is large enough, fixes #489

example: fix warnings

example: remove call to le_device_db_init

license: update text

example: use #define for constants instead of const uint8_t to fix build

example: use AD Flags 0x02 in dual-mode examples

add missing default switch cases

docu: copy editing examples titles

example: fix reading counter characteristic in gatt_counter and spp_and_le_counter

examples: renamed le_counter to gatt_counter and le_streamer to le_streamer_server to indicate suppport for GATT over BR/EDR