Set valgrind output line buffered

Not sure if it makes a difference, but may help when reading the output
log in real time using "tail -f".
Rename data/device1.yaml to data/device_le.yaml
Use human readable Bluetooth address where possible
bt_lib: Add missing packets for basic Android testcase
Initial Android testcase

Reuse packets from device2.yaml. Comment out packets that are not
necessary for now.