Hi
Yes I succesfully ran in Android 5.0 a project containing CustomDrawn components : your own TestAndroid program shipped with LazToApk, which contains only CDButtons from this package.
However, this was several months ago. At this time there was a bug in LazToApk and I was unable to make any other project (and I sent you a mail and gave up).
Now the bug is fixed (THANKS !), but like you I can't run anything on Android 5.0 (I have no other version).
So, It is probably not the Android version responsible for the trouble, but it could be the Android API used (I use currently API21) or possibly CustomDrawn components which have been improved ?
I can't say more but hope this helps a little...
Best regards