Add warning about AIDL CAN HAL

Have the HIDL versions of libcanhaltools and canhalconfigurator provide
a warning message directing the viewer to use the AIDL version.

Bug: 170405615
Test: Build seahawk with AIDL CAN HAL and HIDL canhalconfigurator,
observe warning message.

Change-Id: I83a3dcedbdc5eafd3804e60950d0d8788cd6eddb
2 files changed