Remove obsolete robolectric test runner integration

The `m Run*RoboTests` test runner is no longer supported, remove the
code to generate the Make rules for it.

Also reduce the number of combining steps by passing the extra jars
that need to be combined into the compile step.

This relands Icf05079bf570bed7a10962cbf03459bd53c51f99 with a fix to
reorder the instrumented app classes after dependency classes.

Test: atest --host SystemUiRoboTests
Flag: EXEMPT refactor
Change-Id: I174ceb95af5557e1859eeb12a2f5fac2332975a8