File cleanup during retry mode

Host-side file cleanup is now handled in ModuleRepo by the use of
File.deleteOnExit(). Device-side file cleanup for DalvikeTest is
overlooked since it generates at most two filtering files over infinite
invocations of the runner. A similar strategy will be applied for
AndroidJUnitTest's device-side file cleanup in tradefed.

bug:29362308
Change-Id: I0265449b3525c7ee2836b3c227173d2680684889
2 files changed