Replace error and tracing logs with standard log messages

ERROR logs are replaced by LOG(ERROR)
WARNING logs are replaced by LOG(WARNING)
DEBUG, TRACE and EVENT logs are replaced with DLOG_IF()
These debug logs are compiled in only for debug builds and swapped out
for release builds.

appl_trace_level is replaced by a boolean nfc_debug_enabled.

BT_TRACE_PROTOCOL and BT_TRACE_VERBOSE are not needed since we have
moved to debug mode logging only, which keeps the binary size small for
non-debug builds.

Test: NFC enable/disable, NFC Tag reading
Change-Id: I3aa4dc52dea6a850f21eb4d1d57040b2ab67d6f1
74 files changed