Strip module-info.class files when combining jars

Combining static jars from dependencies may bring in module-info.class
files, which don't make sense once multiple modules have been combined,
and sometimes confuse downstream tools like desugar.  Strip them out
like make does when combining jars.

Test: m checkbuild
Change-Id: I560c5acfcc6e1be9adf604c22cf200581f92f702