lib: Add SDP_IS_TEXT_STR() macro for SDP_TEXT_STR* checking
lib: Add SDP_IS_TEXT_STR() macro for SDP_TEXT_STR* checking

This new macro avoids constructs like "if (d->dtd < SDP_TEXT_STR8 ||
d->dtd > SDP_TEXT_STR32)" which are harder to read.

ComputeCycles/bluez,pstglia/external-bluetooth-bluez,ComputeCycles/bluez,mapfau/bluez,silent-snowman/bluez,mapfau/bluez,pstglia/external-bluetooth-bluez,silent-snowman/bluez,pkarasev3/bluez,ComputeCycles/bluez,mapfau/bluez,silent-snowman/bluez,pkarasev3/bluez,mapfau/bluez,ComputeCycles/bluez,pkarasev3/bluez,pstglia/external-bluetooth-bluez,pkarasev3/bluez,silent-snowman/bluez,pstglia/external-bluetooth-bluez