Revert "Remove os/Android.mk"

Revert "Add the cts-platform-version check"

Revert submission 15776724-rewrite cts-platform-version-check module

Reason for revert: merge conflicts with sc-dev-plus-aosp
Reverted Changes:
I7d018d2b3:Remove os/Android.mk
I613ac5b50:Add the cts-platform-version check

Change-Id: Ie4ec9877d45c2257bdb276d209981cdd8fa95078
1 file changed