test/hfp: enable asserts

test/hfp: test invalid commands

test/hfp: test parsing of apple extensions

test/hfp: test lower command

test/hfp: add long command

hci: remove bool from hci_reserve_packet_buffer and similiar higher layer functions

test: use pkg-config to find cpputest in CMake builds

test: use pkg-config for cpputest build flags

test/hfp: fix link settings test

hfp: filter allowed packet types by sco packets supported by remote

hci: provide remote usable sco packet types

hci: provide usable sco packet types

hfp: remove trailing newline/carriage return in custom command event

test/hfp: verify line buffer for custom commands

test/hfp: add tests for custom commands

test/hfp: fix warnings

test/hfp: test lookup of mandatory safe settings

test/hfp: prepare for use of mandatory safe settings

hfp: add hfp_h2_sync implementation

test/hfp: re-implement hfp h2 synchronization

test/hfp: add sco_demo_util with data tests

test/hfp: test alpha field in call waiting

port: use btstack_strcpy and btstack_cat instead of strcpy/strcat

test/hfp: add +CLIP test data

test: only compile CppUTest files with c++ compiler