Support Timer component
Supported by following commit:
commit 4d8134cb3e76d9449914afdeeeea2581aaf70e2d Author: Steel Wheels Project <wheel@tcn.zaq.ne.jp> Date: Thu Mar 21 17:29:49 2019 +0900 AmberComponent: Add "AMCTimer" class The sample script "timer.ambpkg" has also added to test it.
Support Timer component to get periodically event function call.