When i building for android native environment using MobileFirst Platform Foundation 7.0 it creates a no of zip files under www folder that cause app data size increased to more than 100 mb.
By default no .zip files are created by MobileFirst, and certainly not ones that reach 180MB, in the generated native project.
The only instance in which a .zip file will be created is when setting the"encryptWebResources" option in application-descriptor.xml to "true" in which case the entirety of the www folder will be a .zip file. If this is actually what you've done and this reaches 180MB, then those 180MB are actually your project and you need to check why you have so many, and if you need them all.
If this does not answer your question, edit your question and provide a better explanation.