Strip java files from mockito-core-1.10.19.jar

mockito-core-1.10.19.jar is used as a static java library.  The build
system handles static java libraries by unzipping the jar into the
output directory of modules that depend on it.  This jar contains
.java files, which confuses javac into trying to compile them.

Manually remove the java files using:
zip mockito-core-1.10.19.jar -d *.java

Test: m -j ANDROID_COMPILE_WITH_JACK=true checkbuild
Change-Id: Id7a9569ba0efb37be0d53678a7a2e91e117db581