Generate cpp header file for supported enums.

Auto generate cpp header files for getting supported enum values
for property ID and use this in VTS test to verify the
supportedEnumValues are populated correctly.

Flag: EXEMPT VTS
Test: atest VehiclePropertyAnnotationCppTest \
VtsHalAutomotiveVehicle_TargetTest
Bug: 381123190

Change-Id: I55fa28b75e2e2c668a5f53d1fffcc8fb74c10de5