Add java_data parameter to python modules

csuite has a python module that wants to embed the outputs of java
modules.  This has caused issues with mismatched variants bewteen
the arch-specific python module and the common java modules.  Add
a java_data property that is similar to the data property but
uses the common arch variant.

Bug: 173977903
Test: m checkbuild
Change-Id: I0f2f0e4159650cd5d42b510d5177678e7ee91b4d